diff --git a/heimdall/docker-compose.yml b/heimdall/docker-compose.yml
index e23f204..ddef7d7 100644
--- a/heimdall/docker-compose.yml
+++ b/heimdall/docker-compose.yml
@@ -8,10 +8,10 @@ services:
       PROXY_AUTH_ADD: "false"
 
   server:
-    image: lscr.io/linuxserver/heimdall:2.5.5@sha256:656efe8ee113ebcf8214d53e69cc25645ec11b020dec63e619bd379361cee58e
+    image: lscr.io/linuxserver/heimdall:2.5.6@sha256:dc4f01cd09a9a2f1dbb9c2029d1300070861355754004ac70b33723bd42ff957
     volumes:
       - ${APP_DATA_DIR}/config:/config
     environment:
       - PUID=1000
       - PGID=1000
-    restart: on-failure
\ No newline at end of file
+    restart: on-failure
diff --git a/heimdall/umbrel-app.yml b/heimdall/umbrel-app.yml
index 6c2444c..72acb1e 100644
--- a/heimdall/umbrel-app.yml
+++ b/heimdall/umbrel-app.yml
@@ -3,7 +3,7 @@ id: heimdall
 name: Heimdall
 tagline: Organize your most used web sites in a simple way
 category: files
-version: "2.5.5"
+version: "2.5.6"
 port: 7392
 description: >-
   Heimdall is a dashboard for all your web applications. It doesn't need to be limited to applications though, you can add links to anything you like.
@@ -27,11 +27,29 @@ gallery:
   - 1.jpg
   - 2.jpg
   - 3.jpg
-releaseNotes: ""
+releaseNotes: >
+  This release updates Heimdall from v2.5.5 to v2.5.6. It includes many bug fixes and performance improvements, as well as the following new features:
+
+  - fix: Add more error handling for app test
+
+  - fix: Update jquery, jquery-ui
+  
+  - use jquery-sortablejs instead of jquery-ui
+
+  - fix language setting only available in view
+  
+  - fix: Route titlecolour error
+
+  - Update Korean and Chinese language
+
+  - Added Ukrainian translation
+
+
+  The full release notes are available at https://github.com/linuxserver/Heimdall/releases
 dependencies: []
 path: ""
 torOnly: false
 defaultUsername: ""
 defaultPassword: ""
 submitter: AxelPilop
-submission: https://github.com/getumbrel/umbrel-apps/pull/390
\ No newline at end of file
+submission: https://github.com/getumbrel/umbrel-apps/pull/390