diff --git a/package.json b/package.json
index 34a403f936..51748129c3 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "private": true,
   "name": "cadet-frontend",
-  "version": "1.0.9",
+  "version": "1.0.10",
   "scripts-info": {
     "format": "Format source code",
     "start": "Start the Webpack development server",
@@ -37,7 +37,7 @@
     "draft-js": "^0.10.5",
     "flexboxgrid": "^6.3.1",
     "flexboxgrid-helpers": "^1.1.3",
-    "js-slang": "0.1.7",
+    "js-slang": "0.1.8",
     "lodash": "^4.17.10",
     "lz-string": "^1.4.4",
     "moment": "^2.22.2",
diff --git a/src/reducers/states.ts b/src/reducers/states.ts
index eff90a88f5..6705ae2745 100644
--- a/src/reducers/states.ts
+++ b/src/reducers/states.ts
@@ -161,7 +161,7 @@ export enum Role {
  * Defines what chapters are available for usage.
  * For external libraries, see externalLibraries.ts
  */
-export const sourceChapters = [1, 2]
+export const sourceChapters = [1, 2, 3]
 const latestSourceChapter = sourceChapters.slice(-1)[0]
 
 const currentEnvironment = (): ApplicationEnvironment => {
diff --git a/yarn.lock b/yarn.lock
index 0e47ebfb96..080f66091e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5135,9 +5135,9 @@ js-base64@^2.1.9:
   version "2.4.3"
   resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.4.3.tgz#2e545ec2b0f2957f41356510205214e98fad6582"
 
-js-slang@0.1.7:
-  version "0.1.7"
-  resolved "https://registry.yarnpkg.com/js-slang/-/js-slang-0.1.7.tgz#0c8045c659e7aa9b026281718de32ac5b5372511"
+js-slang@0.1.8:
+  version "0.1.8"
+  resolved "https://registry.yarnpkg.com/js-slang/-/js-slang-0.1.8.tgz#791841db199853f81c14872c0f0366414f31ff96"
   dependencies:
     "@types/acorn" "^4.0.3"
     "@types/estree" "0.0.39"