diff --git a/.gitignore b/.gitignore
index 859af7e00185..ce45005c9bec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,5 @@ apps/web/static/files/noto-*
 apps/web/cypress/screenshots/**/__tkey-*.png
 .vim
 apps/librelingo_tools/dist
+**/dist/
+*.tsbuildinfo
diff --git a/.semaphore/pipeline_3.yml b/.semaphore/pipeline_3.yml
index e94ac7aa78bd..a5003094d211 100644
--- a/.semaphore/pipeline_3.yml
+++ b/.semaphore/pipeline_3.yml
@@ -16,7 +16,8 @@ blocks:
             - cache restore packages-web-$(checksum yarn.lock)
             - git config --global user.email "gitlab@daniel-kantor.com"
             - git config --global user.name "Dániel Kántor"
-            - yarn workspaces run semantic-release -e semantic-release-monorepo
+            - yarn workspace @librelingo/answer-corrector build
+            - yarn workspace @librelingo/answer-corrector semantic-release -e semantic-release-monorepo
       secrets:
         - name: NPM token
         - name: GitHub token
diff --git a/apps/answer-corrector/package.json b/apps/answer-corrector/package.json
index adac37698984..6b36805dd382 100644
--- a/apps/answer-corrector/package.json
+++ b/apps/answer-corrector/package.json
@@ -3,12 +3,15 @@
   "private": false,
   "version": "1.0.0",
   "main": "index.js",
-  "license": "GPLv3",
+  "license": "AGPL-3.0-or-later",
+  "scripts": {
+    "build": "tsc --build"
+  },
   "dependencies": {
     "js-levenshtein": "1.1.6"
   },
   "devDependencies": {
-    "@types/jest": "26.0.20",
+    "@types/jest": "^26.0.20",
     "@types/js-levenshtein": "1.1.0"
   }
 }
diff --git a/apps/answer-corrector/index.test.ts b/apps/answer-corrector/src/index.test.ts
similarity index 100%
rename from apps/answer-corrector/index.test.ts
rename to apps/answer-corrector/src/index.test.ts
diff --git a/apps/answer-corrector/index.ts b/apps/answer-corrector/src/index.ts
similarity index 100%
rename from apps/answer-corrector/index.ts
rename to apps/answer-corrector/src/index.ts
diff --git a/apps/answer-corrector/tsconfig.json b/apps/answer-corrector/tsconfig.json
new file mode 100644
index 000000000000..e0d895c692c3
--- /dev/null
+++ b/apps/answer-corrector/tsconfig.json
@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "composite": true,
+    "outDir": "dist",
+    "rootDir": "src",
+    "esModuleInterop": true,
+    "skipLibCheck": true
+  },
+  "include": [
+    "src/index.ts"
+  ],
+  "exclude": [
+    "node_modules",
+    "build"
+  ]
+}
diff --git a/apps/lluis/package.json b/apps/lluis/package.json
index bf7729071bb2..fdec621d01f9 100644
--- a/apps/lluis/package.json
+++ b/apps/lluis/package.json
@@ -4,7 +4,8 @@
   "version": "0.0.0",
   "scripts": {
     "eslintfix": "exit 0",
-    "prettierfix": "exit 0"
+    "prettierfix": "exit 0",
+    "build": "exit 0"
   },
   "dependencies": {
     "bulma": "0.9.1"
diff --git a/apps/web/src/components/ShortInputChallenge.svelte b/apps/web/src/components/ShortInputChallenge.svelte
index 8020d38ed570..e821a9863419 100644
--- a/apps/web/src/components/ShortInputChallenge.svelte
+++ b/apps/web/src/components/ShortInputChallenge.svelte
@@ -7,7 +7,7 @@
   import InputFieldWithVirtualKeyboard from "./InputFieldWithVirtualKeyboard"
   import Column from "lluis/Column"
   import Columns from "lluis/Columns"
-  import evaluateAnswer from "@librelingo/answer-corrector"
+  import evaluateAnswer from "@librelingo/answer-corrector/src/index.ts"
 
   export let challenge
   export let registerResult
diff --git a/apps/web/tsconfig.json b/apps/web/tsconfig.json
new file mode 100644
index 000000000000..0fa4f01e6fd1
--- /dev/null
+++ b/apps/web/tsconfig.json
@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src"
+  },
+  "include": [
+    "src"
+  ],
+  "references": [
+    {
+      "path": "../answer-corrector"
+    }
+  ]
+}
diff --git a/yarn.lock b/yarn.lock
index bc7aa454c0d9..b0f0a25b58b1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2005,14 +2005,6 @@
   dependencies:
     "@types/istanbul-lib-report" "*"
 
-"@types/jest@26.0.20":
-  version "26.0.20"
-  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.20.tgz#cd2f2702ecf69e86b586e1f5223a60e454056307"
-  integrity sha512-9zi2Y+5USJRxd0FsahERhBwlcvFh6D2GLQnY2FH2BzK8J9s9omvNHIbvABwIluXa0fD8XVKMLTO0aOEuUfACAA==
-  dependencies:
-    jest-diff "^26.0.0"
-    pretty-format "^26.0.0"
-
 "@types/jest@26.x":
   version "26.0.14"
   resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.14.tgz#078695f8f65cb55c5a98450d65083b2b73e5a3f3"
@@ -2021,6 +2013,14 @@
     jest-diff "^25.2.1"
     pretty-format "^25.2.1"
 
+"@types/jest@^26.0.20":
+  version "26.0.20"
+  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.20.tgz#cd2f2702ecf69e86b586e1f5223a60e454056307"
+  integrity sha512-9zi2Y+5USJRxd0FsahERhBwlcvFh6D2GLQnY2FH2BzK8J9s9omvNHIbvABwIluXa0fD8XVKMLTO0aOEuUfACAA==
+  dependencies:
+    jest-diff "^26.0.0"
+    pretty-format "^26.0.0"
+
 "@types/jquery@*":
   version "3.5.5"
   resolved "https://registry.yarnpkg.com/@types/jquery/-/jquery-3.5.5.tgz#2c63f47c9c8d96693d272f5453602afd8338c903"