diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6532f9fc..6e27a1e8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org).
 
-## [Unreleased]
+## [3.1.2] - 2021-06-06
 ### Added
 * *Nothing*
 
@@ -18,7 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 * *Nothing*
 
 ### Fixed
-* *Nothing*
+* [#371](https://github.com/shlinkio/shlink-web-client/issues/371) Recovered PWA functionality.
 
 
 ## [3.1.1] - 2021-05-08
diff --git a/test/app/reducers/appUpdates.test.ts b/test/app/reducers/appUpdates.test.ts
new file mode 100644
index 00000000..114dbb3e
--- /dev/null
+++ b/test/app/reducers/appUpdates.test.ts
@@ -0,0 +1,30 @@
+import reducer, {
+  APP_UPDATE_AVAILABLE,
+  RESET_APP_UPDATE,
+  appUpdateAvailable,
+  resetAppUpdate,
+} from '../../../src/app/reducers/appUpdates';
+
+describe('appUpdatesReducer', () => {
+  describe('reducer', () => {
+    it('returns true on APP_UPDATE_AVAILABLE', () => {
+      expect(reducer(undefined, { type: APP_UPDATE_AVAILABLE })).toEqual(true);
+    });
+
+    it('returns false on RESET_APP_UPDATE', () => {
+      expect(reducer(undefined, { type: RESET_APP_UPDATE })).toEqual(false);
+    });
+  });
+
+  describe('appUpdateAvailable', () => {
+    test('creates expected action', () => {
+      expect(appUpdateAvailable()).toEqual({ type: APP_UPDATE_AVAILABLE });
+    });
+  });
+
+  describe('resetAppUpdate', () => {
+    test('creates expected action', () => {
+      expect(resetAppUpdate()).toEqual({ type: RESET_APP_UPDATE });
+    });
+  });
+});