diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c5a28091..5d3f5bba 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -50,12 +50,12 @@ jobs:
           POSTGRES_USER: postgres
           POSTGRES_PASSWORD: example-password-change-me
       zk-service1:
-        image: bitnami/zookeeper:3.7.1
+        image: bitnamilegacy/zookeeper:3.9.3 # this is the last build, so we can use legacy version (internal lib uses different one already)
         env:
           ALLOW_ANONYMOUS_LOGIN: "yes"
           JVMFLAGS: "-Xmx512m -Xms64m"
       zk1:
-        image: bitnami/zookeeper:3.7.1
+        image: bitnamilegacy/zookeeper:3.9.3 # this is the last build, so we can use legacy version (internal lib uses different one already)
         env:
           ALLOW_ANONYMOUS_LOGIN: "yes"
           JVMFLAGS: "-Xmx512m -Xms64m"
diff --git a/README.md b/README.md
index e2de3999..7444277a 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,11 @@
+> [!IMPORTANT]
+> **This repository is no longer open source**
+>
+> To better serve Wise business and customer needs, this library is no longer open source and will not receive further public updates. The codebase has moved to our internal systems.
+>
+> **For continued development and access, please refer to the internal repository:**
+> https://github.com/transferwise/tw-tasks-executor-private
+
 # TwTasks - TransferWise Tasks Executor
 
 ![Apache 2](https://img.shields.io/hexpm/l/plug.svg)
diff --git a/demoapp/docker/docker-compose.yml b/demoapp/docker/docker-compose.yml
index ac3d83bd..2ff760bf 100644
--- a/demoapp/docker/docker-compose.yml
+++ b/demoapp/docker/docker-compose.yml
@@ -4,7 +4,7 @@ version: '3.3'
 
 services:
   zk-service:
-    image: bitnami/zookeeper:3.7.1
+    image: bitnamilegacy/zookeeper:3.9.3 # this is the last build, so we can use legacy version (internal lib uses different one already)
     hostname: zk-service
     ports:
       - "2181:2181"
@@ -14,7 +14,7 @@ services:
     volumes:
       - ./java/fullgc-agent.jar:/tmp/fullgc-agent.jar
   kafka-zk:
-    image: bitnami/zookeeper:3.7.1
+    image: bitnamilegacy/zookeeper:3.9.3 # this is the last build, so we can use legacy version (internal lib uses different one already)
     hostname: kafka-zk
     ports:
       - "2183:2181"
diff --git a/integration-tests/src/test/resources/docker-compose.yml b/integration-tests/src/test/resources/docker-compose.yml
index 9c286a50..b2c1f612 100644
--- a/integration-tests/src/test/resources/docker-compose.yml
+++ b/integration-tests/src/test/resources/docker-compose.yml
@@ -2,7 +2,7 @@ version: '3.7'
 
 services:
   zookeeper:
-    image: bitnami/zookeeper:3.7.1
+    image: bitnamilegacy/zookeeper:3.9.3 # this is the last build, so we can use legacy version (internal lib uses different one already)
     hostname: zookeeper
     ports:
       - "2181"
@@ -10,7 +10,7 @@ services:
       ALLOW_ANONYMOUS_LOGIN: "yes"
       JVMFLAGS: -server -Xms25m -Xmx512m -Djava.awt.headless=true -XX:MaxMetaspaceExpansion=2M -XX:+HeapDumpOnOutOfMemoryError -XX:GCHeapFreeLimit=5 -XX:GCTimeLimit=90 -XX:ReservedCodeCacheSize=256m -Djava.security.egd=file:/dev/./urandom -XX:SoftRefLRUPolicyMSPerMB=5 -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:+ExplicitGCInvokesConcurrent
   kafka-zk:
-    image: bitnami/zookeeper:3.7.1
+    image: bitnamilegacy/zookeeper:3.9.3 # this is the last build, so we can use legacy version (internal lib uses different one already)
     hostname: kafka-zk
     ports:
       - "2181"