diff --git a/backend/package-lock.json b/backend/package-lock.json
index ed70959..3e5a15a 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -212,11 +212,24 @@
       "resolved": "https://registry.npmjs.org/@protobufjs/utf8/-/utf8-1.1.0.tgz",
       "integrity": "sha1-p3c2C1s5oaLlEG+OhY8v0tBgxXA="
     },
+    "@sindresorhus/is": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-4.0.0.tgz",
+      "integrity": "sha512-FyD2meJpDPjyNQejSjvnhpgI/azsQkA4lGbuu5BQZfjvJ9cbRZXzeWL2HceCekW4lixO9JPesIIQkSoLjeJHNQ=="
+    },
     "@sqltools/formatter": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/@sqltools/formatter/-/formatter-1.2.2.tgz",
       "integrity": "sha512-/5O7Fq6Vnv8L6ucmPjaWbVG1XkP4FO+w5glqfkIsq3Xw4oyNAdJddbnYodNDAfjVUvo/rrSCTom4kAND7T1o5Q=="
     },
+    "@szmarczak/http-timer": {
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-4.0.5.tgz",
+      "integrity": "sha512-PyRA9sm1Yayuj5OIoJ1hGt2YISX45w9WcFbh6ddT0Z/0yaFxOtGLInr4jUfU1EAFVs0Yfyfev4RNwBlUaHdlDQ==",
+      "requires": {
+        "defer-to-connect": "^2.0.0"
+      }
+    },
     "@types/accepts": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/@types/accepts/-/accepts-1.3.5.tgz",
@@ -234,6 +247,17 @@
         "@types/node": "*"
       }
     },
+    "@types/cacheable-request": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/@types/cacheable-request/-/cacheable-request-6.0.1.tgz",
+      "integrity": "sha512-ykFq2zmBGOCbpIXtoVbz4SKY5QriWPh3AjyU4G74RYbtt5yOc5OfaY75ftjg7mikMOla1CTGpX3lLbuJh8DTrQ==",
+      "requires": {
+        "@types/http-cache-semantics": "*",
+        "@types/keyv": "*",
+        "@types/node": "*",
+        "@types/responselike": "*"
+      }
+    },
     "@types/connect": {
       "version": "3.4.34",
       "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.34.tgz",
@@ -312,6 +336,11 @@
       "resolved": "https://registry.npmjs.org/@types/http-assert/-/http-assert-1.5.1.tgz",
       "integrity": "sha512-PGAK759pxyfXE78NbKxyfRcWYA/KwW17X290cNev/qAsn9eQIxkH4shoNBafH37wewhDG/0p1cHPbK6+SzZjWQ=="
     },
+    "@types/http-cache-semantics": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/@types/http-cache-semantics/-/http-cache-semantics-4.0.0.tgz",
+      "integrity": "sha512-c3Xy026kOF7QOTn00hbIllV1dLR9hG9NkSrLQgCVs8NF6sBU+VGWjD3wLPhmh1TYAc7ugCFsvHYMN4VcBN1U1A=="
+    },
     "@types/http-errors": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/@types/http-errors/-/http-errors-1.8.0.tgz",
@@ -334,6 +363,14 @@
       "resolved": "https://registry.npmjs.org/@types/keygrip/-/keygrip-1.0.2.tgz",
       "integrity": "sha512-GJhpTepz2udxGexqos8wgaBx4I/zWIDPh/KOGEwAqtuGDkOUJu5eFvwmdBX4AmB8Odsr+9pHCQqiAqDL/yKMKw=="
     },
+    "@types/keyv": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/@types/keyv/-/keyv-3.1.1.tgz",
+      "integrity": "sha512-MPtoySlAZQ37VoLaPcTHCu1RWJ4llDkULYZIzOYxlhxBqYPB0RsRlmMU0R6tahtFe27mIdkHV+551ZWV4PLmVw==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/koa": {
       "version": "2.11.6",
       "resolved": "https://registry.npmjs.org/@types/koa/-/koa-2.11.6.tgz",
@@ -401,6 +438,14 @@
       "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.3.tgz",
       "integrity": "sha512-ewFXqrQHlFsgc09MK5jP5iR7vumV/BYayNC6PgJO2LPe8vrnNFyjQjSppfEngITi0qvfKtzFvgKymGheFM9UOA=="
     },
+    "@types/responselike": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@types/responselike/-/responselike-1.0.0.tgz",
+      "integrity": "sha512-85Y2BjiufFzaMIlvJDvTTB8Fxl2xfLo4HgmHzVBz08w4wDePCTjYw66PdrolO0kzli3yam/YCgRufyo1DdQVTA==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/semver": {
       "version": "7.3.4",
       "resolved": "https://registry.npmjs.org/@types/semver/-/semver-7.3.4.tgz",
@@ -1126,6 +1171,25 @@
         "dicer": "0.3.0"
       }
     },
+    "cacheable-lookup": {
+      "version": "5.0.4",
+      "resolved": "https://registry.npmjs.org/cacheable-lookup/-/cacheable-lookup-5.0.4.tgz",
+      "integrity": "sha512-2/kNscPhpcxrOigMZzbiWF7dz8ilhb/nIHU3EyZiXWXpeq/au8qJ8VhdftMkty3n7Gj6HIGalQG8oiBNB3AJgA=="
+    },
+    "cacheable-request": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/cacheable-request/-/cacheable-request-7.0.1.tgz",
+      "integrity": "sha512-lt0mJ6YAnsrBErpTMWeu5kl/tg9xMAWjavYTN6VQXM1A/teBITuNcccXsCxF0tDQQJf9DfAaX5O4e0zp0KlfZw==",
+      "requires": {
+        "clone-response": "^1.0.2",
+        "get-stream": "^5.1.0",
+        "http-cache-semantics": "^4.0.0",
+        "keyv": "^4.0.0",
+        "lowercase-keys": "^2.0.0",
+        "normalize-url": "^4.1.0",
+        "responselike": "^2.0.0"
+      }
+    },
     "call-bind": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.2.tgz",
@@ -1272,6 +1336,14 @@
         "wrap-ansi": "^7.0.0"
       }
     },
+    "clone-response": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/clone-response/-/clone-response-1.0.2.tgz",
+      "integrity": "sha1-0dyXOSAxTfZ/vrlCI7TuNQI56Ws=",
+      "requires": {
+        "mimic-response": "^1.0.0"
+      }
+    },
     "color-convert": {
       "version": "1.9.3",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
@@ -1417,6 +1489,21 @@
       "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=",
       "dev": true
     },
+    "decompress-response": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-6.0.0.tgz",
+      "integrity": "sha512-aW35yZM6Bb/4oJlZncMH2LCoZtJXTRxES17vE3hoRiowU2kWHaJKFkSBDnDR+cm9J+9QhXmREyIfv0pji9ejCQ==",
+      "requires": {
+        "mimic-response": "^3.1.0"
+      },
+      "dependencies": {
+        "mimic-response": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-3.1.0.tgz",
+          "integrity": "sha512-z0yWI+4FDrrweS8Zmt4Ej5HdJmky15+L2e6Wgn3+iK5fWzb6T3fhNFq2+MeTRb064c6Wr4N/wv0DzQTjNzHNGQ=="
+        }
+      }
+    },
     "deep-is": {
       "version": "0.1.3",
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.3.tgz",
@@ -1428,6 +1515,11 @@
       "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-4.2.2.tgz",
       "integrity": "sha512-FJ3UgI4gIl+PHZm53knsuSFpE+nESMr7M4v9QcgB7S63Kj/6WqMiFQJpBBYz1Pt+66bZpP3Q7Lye0Oo9MPKEdg=="
     },
+    "defer-to-connect": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/defer-to-connect/-/defer-to-connect-2.0.0.tgz",
+      "integrity": "sha512-bYL2d05vOSf1JEZNx5vSAtPuBMkX8K9EUutg7zlKvTqKXHt7RhWJFbmd7qakVuf13i+IkGmp6FwSsONOf6VYIg=="
+    },
     "define-properties": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.3.tgz",
@@ -2292,6 +2384,14 @@
       "integrity": "sha1-uWjGsKBDhDJJAui/Gl3zJXmkUP4=",
       "dev": true
     },
+    "get-stream": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-5.2.0.tgz",
+      "integrity": "sha512-nBF+F1rAZVCu/p7rjzgA+Yb4lfYXrpl7a6VmJrU8wF9I1CKvP/QwPNZHnOlwbTkY6dvtFIzFMSyQXbLoTQPRpA==",
+      "requires": {
+        "pump": "^3.0.0"
+      }
+    },
     "glob": {
       "version": "7.1.6",
       "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
@@ -2337,6 +2437,24 @@
         "slash": "^3.0.0"
       }
     },
+    "got": {
+      "version": "11.8.1",
+      "resolved": "https://registry.npmjs.org/got/-/got-11.8.1.tgz",
+      "integrity": "sha512-9aYdZL+6nHmvJwHALLwKSUZ0hMwGaJGYv3hoPLPgnT8BoBXm1SjnZeky+91tfwJaDzun2s4RsBRy48IEYv2q2Q==",
+      "requires": {
+        "@sindresorhus/is": "^4.0.0",
+        "@szmarczak/http-timer": "^4.0.5",
+        "@types/cacheable-request": "^6.0.1",
+        "@types/responselike": "^1.0.0",
+        "cacheable-lookup": "^5.0.3",
+        "cacheable-request": "^7.0.1",
+        "decompress-response": "^6.0.0",
+        "http2-wrapper": "^1.0.0-beta.5.2",
+        "lowercase-keys": "^2.0.0",
+        "p-cancelable": "^2.0.0",
+        "responselike": "^2.0.0"
+      }
+    },
     "graceful-fs": {
       "version": "4.2.4",
       "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
@@ -2464,6 +2582,11 @@
         "entities": "^2.0.0"
       }
     },
+    "http-cache-semantics": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/http-cache-semantics/-/http-cache-semantics-4.1.0.tgz",
+      "integrity": "sha512-carPklcUh7ROWRK7Cv27RPtdhYhUsela/ue5/jKzjegVvXDqM2ILE9Q2BGn9JZJh1g87cp56su/FgQSzcWS8cQ=="
+    },
     "http-errors": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.8.0.tgz",
@@ -2483,6 +2606,15 @@
         }
       }
     },
+    "http2-wrapper": {
+      "version": "1.0.0-beta.5.2",
+      "resolved": "https://registry.npmjs.org/http2-wrapper/-/http2-wrapper-1.0.0-beta.5.2.tgz",
+      "integrity": "sha512-xYz9goEyBnC8XwXDTuC/MZ6t+MrKVQZOk4s7+PaDkwIsQd8IwqvM+0M6bA/2lvG8GHXcPdf+MejTUeO2LCPCeQ==",
+      "requires": {
+        "quick-lru": "^5.1.1",
+        "resolve-alpn": "^1.0.0"
+      }
+    },
     "ieee754": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
@@ -2683,6 +2815,11 @@
         "esprima": "^4.0.0"
       }
     },
+    "json-buffer": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/json-buffer/-/json-buffer-3.0.1.tgz",
+      "integrity": "sha512-4bV5BfR2mqfQTJm+V5tPPdf+ZpuhiIvTuAB5g8kcrXOZpTT/QwwVRWBywX1ozr6lEuPdbHxwaJlm9G6mI2sfSQ=="
+    },
     "json-schema-traverse": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
@@ -2703,6 +2840,14 @@
         "minimist": "^1.2.0"
       }
     },
+    "keyv": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/keyv/-/keyv-4.0.3.tgz",
+      "integrity": "sha512-zdGa2TOpSZPq5mU6iowDARnMBZgtCqJ11dJROFi6tg6kTn4nuUdU09lFyLFSaHrWqpIJ+EBq4E8/Dc0Vx5vLdA==",
+      "requires": {
+        "json-buffer": "3.0.1"
+      }
+    },
     "leven": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/leven/-/leven-2.1.0.tgz",
@@ -2787,6 +2932,11 @@
         "signal-exit": "^3.0.0"
       }
     },
+    "lowercase-keys": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/lowercase-keys/-/lowercase-keys-2.0.0.tgz",
+      "integrity": "sha512-tqNXrS78oMOE73NMxK4EMLQsQowWf8jKooH9g7xPavRT706R6bkQJ6DY2Te7QukaZsulxa30wQ7bk0pm4XiHmA=="
+    },
     "lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
@@ -2939,6 +3089,11 @@
         "mime-db": "1.45.0"
       }
     },
+    "mimic-response": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-1.0.1.tgz",
+      "integrity": "sha512-j5EctnkH7amfV/q5Hgmoal1g2QHFJRraOtmx0JpIqkxhBhI/lJSl1nMpQ45hVarwNETOoWEimndZ4QK0RHxuxQ=="
+    },
     "minimatch": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
@@ -3039,6 +3194,11 @@
       "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==",
       "dev": true
     },
+    "normalize-url": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/normalize-url/-/normalize-url-4.5.0.tgz",
+      "integrity": "sha512-2s47yzUxdexf1OhyRi4Em83iQk0aPvwTddtFz4hnSSw9dCEsLEGf6SwIO8ss/19S9iBb5sJaOuTvTGDeZI00BQ=="
+    },
     "nth-check": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-2.0.0.tgz",
@@ -3134,6 +3294,11 @@
         "word-wrap": "^1.2.3"
       }
     },
+    "p-cancelable": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/p-cancelable/-/p-cancelable-2.0.0.tgz",
+      "integrity": "sha512-wvPXDmbMmu2ksjkB4Z3nZWTSkJEb9lqVdMaCKpZUGJG9TMiNp9XcbG3fn9fPKjem04fJMJnXoyFPk2FmgiaiNg=="
+    },
     "p-limit": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-1.3.0.tgz",
@@ -3369,6 +3534,11 @@
       "resolved": "https://registry.npmjs.org/quick-format-unescaped/-/quick-format-unescaped-4.0.1.tgz",
       "integrity": "sha512-RyYpQ6Q5/drsJyOhrWHYMWTedvjTIat+FTwv0K4yoUxzvekw2aRHMQJLlnvt8UantkZg2++bEzD9EdxXqkWf4A=="
     },
+    "quick-lru": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/quick-lru/-/quick-lru-5.1.1.tgz",
+      "integrity": "sha512-WuyALRjWPDGtt/wzJiadO5AXY+8hZ80hVpe6MyivgraREW751X3SbhRvG3eLKOYN+8VEvqLcf3wdnt44Z4S4SA=="
+    },
     "random-bytes": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/random-bytes/-/random-bytes-1.0.0.tgz",
@@ -3497,12 +3667,25 @@
         "path-parse": "^1.0.6"
       }
     },
+    "resolve-alpn": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/resolve-alpn/-/resolve-alpn-1.0.0.tgz",
+      "integrity": "sha512-rTuiIEqFmGxne4IovivKSDzld2lWW9QCjqv80SYjPgf+gS35eaCAjaP54CCwGAwBtnCsvNLYtqxe1Nw+i6JEmA=="
+    },
     "resolve-from": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
       "integrity": "sha512-pb/MYmXstAkysRFx8piNI1tGFNQIFA3vkE3Gq4EuA1dF6gHp/+vgZqsCGJapvy8N3Q+4o7FwvquPJcnZ7RYy4g==",
       "dev": true
     },
+    "responselike": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/responselike/-/responselike-2.0.0.tgz",
+      "integrity": "sha512-xH48u3FTB9VsZw7R+vvgaKeLKzT6jOogbQhEe/jewwnZgzPcnyWui2Av6JpoYZF/91uueC+lqhWqeURw5/qhCw==",
+      "requires": {
+        "lowercase-keys": "^2.0.0"
+      }
+    },
     "ret": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/ret/-/ret-0.2.2.tgz",
diff --git a/backend/package.json b/backend/package.json
index c92dc4e..0822b62 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -26,6 +26,7 @@
     "fastify-http-proxy": "^4.2.0",
     "fastify-sensible": "^3.1.0",
     "fastify-session": "^5.2.1",
+    "got": "^11.8.1",
     "lodash": "^4.17.20",
     "mongodb": "^3.6.3",
     "nanoid": "^3.1.20",
diff --git a/backend/src/routes/website-api/errors.ts b/backend/src/routes/website-api/errors.ts
index f9256c9..72dae55 100644
--- a/backend/src/routes/website-api/errors.ts
+++ b/backend/src/routes/website-api/errors.ts
@@ -1,10 +1,18 @@
 import { ApolloError } from 'apollo-server-fastify';
 
-export class UnknownPromptError extends Error {
+export class CaptchaError extends ApolloError {
+  public name = 'CaptchaError';
+
+  public constructor() {
+    super('Captcha validation failed', 'CAPTCHA_ERROR');
+  }
+}
+
+export class UnknownPromptError extends ApolloError {
   public name = 'UnknownPromptError';
 
   public constructor() {
-    super('Unknown prompt');
+    super('Unknown prompt', 'UNKNOWN_PROMPT_ERROR');
   }
 }
 
diff --git a/backend/src/routes/website-api/resolvers/login-resolver.ts b/backend/src/routes/website-api/resolvers/login-resolver.ts
index e6d7386..361cc7a 100644
--- a/backend/src/routes/website-api/resolvers/login-resolver.ts
+++ b/backend/src/routes/website-api/resolvers/login-resolver.ts
@@ -6,9 +6,9 @@ import {
   Arg, Ctx, Mutation, Resolver,
 } from 'type-graphql';
 import {
-  encryptSymmetrical, encryptWithPublicKey, generatePrivatePublicPair, isObject,
+  encryptSymmetrical, encryptWithPublicKey, generatePrivatePublicPair, isObject, verifyCaptchaResponse,
 } from '../../../utils';
-import { InvalidVulcanCredentialsError, UnknownPromptError } from '../errors';
+import { CaptchaError, InvalidVulcanCredentialsError, UnknownPromptError } from '../errors';
 import LoginResult from '../models/login-result';
 import type LoginResultStudent from '../models/login-result-student';
 import type { WebsiteAPIContext } from '../types';
@@ -21,10 +21,12 @@ export default class LoginResolver {
       @Arg('username') username: string,
       @Arg('password') password: string,
       @Arg('host') host: string,
+      @Arg('captchaResponse') captchaResponse: string,
       @Ctx() { sessionData, reply }: WebsiteAPIContext,
   ): Promise<LoginResult> {
     const prompt = sessionData.prompts.get(promptId);
     if (!prompt) throw new UnknownPromptError();
+    if (!await verifyCaptchaResponse(captchaResponse)) throw new CaptchaError();
     const client = new Client(host, () => ({
       username,
       password,
diff --git a/backend/src/utils/index.ts b/backend/src/utils/index.ts
index c740007..f902049 100644
--- a/backend/src/utils/index.ts
+++ b/backend/src/utils/index.ts
@@ -1,3 +1,4 @@
+import got from 'got';
 import _ from 'lodash';
 import { ParamError } from '../errors';
 import SessionData from '../session-data';
@@ -58,3 +59,20 @@ export function getSessionData(session: Session): SessionData {
   }
   return session.data;
 }
+
+export async function verifyCaptchaResponse(response: string): Promise<boolean> {
+  const { body } = await got.post<{
+    success: boolean,
+    challenge_ts?: string;
+    hostname?: string;
+    'error-codes'?: string[]
+  }>('https://www.google.com/recaptcha/api/siteverify', {
+    responseType: 'json',
+    searchParams: {
+      secret: requireEnv('CAPTCHA_SECRET'),
+      response,
+    },
+  });
+  console.log(body);
+  return body.success;
+}
diff --git a/website/.env.development b/website/.env.development
new file mode 100644
index 0000000..7f8be3e
--- /dev/null
+++ b/website/.env.development
@@ -0,0 +1 @@
+VUE_APP_CAPTCHA_SITE_KEY=6LfAxzUaAAAAANF5VLy39hbgx5K6WTQTa2YDdhmC
diff --git a/website/.eslintrc.js b/website/.eslintrc.js
index eff21ca..1537043 100644
--- a/website/.eslintrc.js
+++ b/website/.eslintrc.js
@@ -14,6 +14,7 @@ module.exports = {
   rules: {
     'no-console': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
     'no-debugger': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
+    'import/prefer-default-export': ['warn']
   },
   overrides: [
     {
diff --git a/website/package-lock.json b/website/package-lock.json
index f0a67c1..55c4155 100644
--- a/website/package-lock.json
+++ b/website/package-lock.json
@@ -16083,6 +16083,11 @@
       "resolved": "https://registry.npmjs.org/vue-property-decorator/-/vue-property-decorator-9.1.2.tgz",
       "integrity": "sha512-xYA8MkZynPBGd/w5QFJ2d/NM0z/YeegMqYTphy7NJQXbZcuU6FC6AOdUAcy4SXP+YnkerC6AfH+ldg7PDk9ESQ=="
     },
+    "vue-recaptcha": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/vue-recaptcha/-/vue-recaptcha-1.3.0.tgz",
+      "integrity": "sha512-9Qf1niyHq4QbEUhsvdUkS8BoOyhYwpp8v+imUSj67ffDo9RQ6h8Ekq8EGnw/GKViXCwWalp7EEY/n/fOtU0FyA=="
+    },
     "vue-style-loader": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/vue-style-loader/-/vue-style-loader-4.1.2.tgz",
diff --git a/website/package.json b/website/package.json
index bf96b54..6f2105b 100644
--- a/website/package.json
+++ b/website/package.json
@@ -16,6 +16,7 @@
     "vue": "^2.6.11",
     "vue-class-component": "^7.2.3",
     "vue-property-decorator": "^9.1.2",
+    "vue-recaptcha": "^1.3.0",
     "vuetify": "^2.2.11"
   },
   "devDependencies": {
diff --git a/website/public/index.html b/website/public/index.html
index cb52c7d..3482550 100644
--- a/website/public/index.html
+++ b/website/public/index.html
@@ -8,6 +8,7 @@
     <title><%= htmlWebpackPlugin.options.title %></title>
     <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900">
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@mdi/font@latest/css/materialdesignicons.min.css">
+    <script src="https://www.google.com/recaptcha/api.js?onload=vueRecaptchaApiLoaded&render=explicit" async defer></script>
   </head>
   <body>
     <noscript>
diff --git a/website/src/compontents/authenticate-prompt-windows/login-window.vue b/website/src/compontents/authenticate-prompt-windows/login-window.vue
index dd995d2..6e433be 100644
--- a/website/src/compontents/authenticate-prompt-windows/login-window.vue
+++ b/website/src/compontents/authenticate-prompt-windows/login-window.vue
@@ -17,19 +17,31 @@
           outlined
           :rules="requiredRules"
         />
+        <div class="overflow-x-auto">
+          <vue-recaptcha
+            ref="recaptcha"
+            class="d-inline-block"
+            :sitekey="captchaSiteKey"
+            @verify="captchaVerify"
+            @expired="captchaReset()"
+            @error="captchaReset()"
+          />
+        </div>
       </div>
-      <v-alert type="error" class="mx-2" :value="error === 'invalid-credentials'">
-        Dane logowania są nieprawidłowe
-      </v-alert>
-      <v-alert type="error" class="mx-2" :value="error === 'other'">
-        Podczas logowania wystąpił błąd
+      <v-alert type="error" class="mx-2" :value="errorMessage !== null">
+        {{ errorMessage }}
       </v-alert>
       <v-card-actions>
         <v-btn color="primary" text outlined @click="back" :disabled="loading">
           Wróć
         </v-btn>
         <v-spacer />
-        <v-btn color="primary" :loading="loading" type="submit" :disabled="!formValid">
+        <v-btn
+          color="primary"
+          :loading="loading"
+          type="submit"
+          :disabled="!formValid || !this.captchaResponse"
+        >
           Zaloguj się
         </v-btn>
       </v-card-actions>
@@ -44,6 +56,8 @@ import {
 import { PromptInfo } from '@/types';
 import { hasErrorCode, sdk } from '@/pages/authenticate-prompt/sdk';
 import { InputValidationRules } from 'vuetify';
+import VueRecaptcha from 'vue-recaptcha';
+import { requireEnv } from '@/utils';
 
 interface VForm extends HTMLFormElement {
   validate(): boolean;
@@ -52,6 +66,9 @@ interface VForm extends HTMLFormElement {
 
 @Component({
   name: 'LoginWindow',
+  components: {
+    VueRecaptcha,
+  },
 })
 export default class LoginWindow extends Vue {
   @Prop({
@@ -62,6 +79,10 @@ export default class LoginWindow extends Vue {
 
   @Ref('form') form!: VForm;
 
+  @Ref('recaptcha') recaptcha!: VueRecaptcha;
+
+  readonly captchaSiteKey = requireEnv('VUE_APP_CAPTCHA_SITE_KEY');
+
   readonly hosts = [
     {
       text: 'Vulcan',
@@ -85,19 +106,30 @@ export default class LoginWindow extends Vue {
 
   password = '';
 
+  captchaResponse: string | null = null;
+
   loading = false;
 
-  error: 'invalid-credentials' | 'other' | null = null;
+  error: 'invalid-credentials' | 'other' | 'captcha' | null = null;
 
   reset() {
     this.host = 'fakelog.cf';
     this.username = '';
     this.password = '';
     this.form.resetValidation();
+    this.recaptcha.reset();
+  }
+
+  captchaVerify(response: string) {
+    this.captchaResponse = response;
+  }
+
+  captchaReset() {
+    this.captchaResponse = null;
   }
 
   async submit() {
-    if (this.loading || !this.formValid) return;
+    if (this.loading || !this.formValid || !this.captchaResponse) return;
     this.error = null;
     this.loading = true;
     try {
@@ -106,13 +138,16 @@ export default class LoginWindow extends Vue {
         host: this.host,
         username: this.username,
         password: this.password,
+        captchaResponse: this.captchaResponse,
       });
       const { students } = login;
       this.$emit('login', { students });
       this.reset();
     } catch (error) {
       console.error(error);
-      this.error = hasErrorCode(error, 'INVALID_VULCAN_CREDENTIALS') ? 'invalid-credentials' : 'other';
+      if (hasErrorCode(error, 'INVALID_VULCAN_CREDENTIALS')) this.error = 'invalid-credentials';
+      if (hasErrorCode(error, 'CAPTCHA_ERROR')) this.error = 'captcha';
+      else this.error = 'other';
     }
     this.loading = false;
   }
@@ -125,5 +160,12 @@ export default class LoginWindow extends Vue {
   mounted() {
     this.reset();
   }
+
+  get errorMessage() {
+    if (this.error === null) return null;
+    if (this.error === 'invalid-credentials') return 'Dane logowania są nieprawidłowe';
+    if (this.error === 'captcha') return 'Błąd weryfikacji';
+    return 'Podczas logowania wystąpił błąd';
+  }
 }
 </script>
diff --git a/website/src/graphql/generated.ts b/website/src/graphql/generated.ts
index b4218c5..55f2048 100644
--- a/website/src/graphql/generated.ts
+++ b/website/src/graphql/generated.ts
@@ -53,6 +53,7 @@ export type Mutation = {
 };
 
 export type MutationLoginArgs = {
+  captchaResponse: Scalars['String'];
   host: Scalars['String'];
   password: Scalars['String'];
   username: Scalars['String'];
@@ -75,6 +76,7 @@ export type LoginMutationVariables = Exact<{
   host: Scalars['String'];
   username: Scalars['String'];
   password: Scalars['String'];
+  captchaResponse: Scalars['String'];
 }>;
 
 export type LoginMutation = (
@@ -105,12 +107,13 @@ export type GetPromptInfoQuery = (
 );
 
 export const LoginDocument = gql`
-    mutation Login($promptId: String!, $host: String!, $username: String!, $password: String!) {
+    mutation Login($promptId: String!, $host: String!, $username: String!, $password: String!, $captchaResponse: String!) {
   login(
     host: $host
     password: $password
     username: $username
     promptId: $promptId
+    captchaResponse: $captchaResponse
   ) {
     students {
       studentId
diff --git a/website/src/graphql/mutations/login.ts b/website/src/graphql/mutations/login.ts
index 5bd7102..886c1c9 100644
--- a/website/src/graphql/mutations/login.ts
+++ b/website/src/graphql/mutations/login.ts
@@ -1,7 +1,7 @@
 import gql from 'graphql-tag';
 
-export default gql`mutation Login($promptId: String!, $host: String!, $username: String!, $password: String!) {
-  login(host: $host, password: $password, username: $username, promptId: $promptId) {
+export default gql`mutation Login($promptId: String!, $host: String!, $username: String!, $password: String!, $captchaResponse: String!) {
+  login(host: $host, password: $password, username: $username, promptId: $promptId, captchaResponse: $captchaResponse) {
     students {
       studentId
       name
diff --git a/website/src/utils.ts b/website/src/utils.ts
new file mode 100644
index 0000000..ec5170a
--- /dev/null
+++ b/website/src/utils.ts
@@ -0,0 +1,5 @@
+export function requireEnv(name: string): string {
+  const value = process.env[name];
+  if (value === undefined) throw new Error(`Environment variable ${name} not set`);
+  return value;
+}