diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 608a485c..3bb4fda2 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -9,7 +9,7 @@ micrometer = "1.16.0-M1"
 micrometer-docs-gen = "1.0.4"
 micrometer-tracing = "1.6.0-M1"
 protobuf = "3.25.8"
-pulsar = "4.0.5"
+pulsar = "4.0.6"
 pulsar-reactive = "0.7.0"
 reactor = "2025.0.0-M5"
 spring = "7.0.0-M7"
diff --git a/spring-pulsar-sample-apps/sample-failover-custom-router/compose.yaml b/spring-pulsar-sample-apps/sample-failover-custom-router/compose.yaml
index d783ce5f..11096d9e 100644
--- a/spring-pulsar-sample-apps/sample-failover-custom-router/compose.yaml
+++ b/spring-pulsar-sample-apps/sample-failover-custom-router/compose.yaml
@@ -1,6 +1,6 @@
 services:
   pulsar:
-    image: 'apachepulsar/pulsar:4.0.5'
+    image: 'apachepulsar/pulsar:4.0.6'
     ports:
       - '6650'
       - '8080'
diff --git a/spring-pulsar-sample-apps/sample-imperative-produce-consume/compose.yaml b/spring-pulsar-sample-apps/sample-imperative-produce-consume/compose.yaml
index d783ce5f..11096d9e 100644
--- a/spring-pulsar-sample-apps/sample-imperative-produce-consume/compose.yaml
+++ b/spring-pulsar-sample-apps/sample-imperative-produce-consume/compose.yaml
@@ -1,6 +1,6 @@
 services:
   pulsar:
-    image: 'apachepulsar/pulsar:4.0.5'
+    image: 'apachepulsar/pulsar:4.0.6'
     ports:
       - '6650'
       - '8080'
diff --git a/spring-pulsar-sample-apps/sample-pulsar-binder/compose.yaml b/spring-pulsar-sample-apps/sample-pulsar-binder/compose.yaml
index d783ce5f..11096d9e 100644
--- a/spring-pulsar-sample-apps/sample-pulsar-binder/compose.yaml
+++ b/spring-pulsar-sample-apps/sample-pulsar-binder/compose.yaml
@@ -1,6 +1,6 @@
 services:
   pulsar:
-    image: 'apachepulsar/pulsar:4.0.5'
+    image: 'apachepulsar/pulsar:4.0.6'
     ports:
       - '6650'
       - '8080'
diff --git a/spring-pulsar-sample-apps/sample-pulsar-functions/sample-signup-function/build.gradle b/spring-pulsar-sample-apps/sample-pulsar-functions/sample-signup-function/build.gradle
index baca70b7..0c58eec8 100644
--- a/spring-pulsar-sample-apps/sample-pulsar-functions/sample-signup-function/build.gradle
+++ b/spring-pulsar-sample-apps/sample-pulsar-functions/sample-signup-function/build.gradle
@@ -11,7 +11,8 @@ repositories {
 }
 
 def versionCatalog = extensions.getByType(VersionCatalogsExtension).named("libs")
-def pulsarVersion = project.properties['pulsarVersion'] ?: versionCatalog.findVersion("pulsar").orElseThrow().displayName
+// At Pulsar 4.0.6 things break related to jdk8 requirement - hardcoding at 4.0.5 for now
+def pulsarVersion = '4.0.5'
 
 dependencies {
 	implementation "org.apache.pulsar:pulsar-client-all:${pulsarVersion}"
diff --git a/spring-pulsar-sample-apps/sample-pulsar-reader/compose.yaml b/spring-pulsar-sample-apps/sample-pulsar-reader/compose.yaml
index d783ce5f..11096d9e 100644
--- a/spring-pulsar-sample-apps/sample-pulsar-reader/compose.yaml
+++ b/spring-pulsar-sample-apps/sample-pulsar-reader/compose.yaml
@@ -1,6 +1,6 @@
 services:
   pulsar:
-    image: 'apachepulsar/pulsar:4.0.5'
+    image: 'apachepulsar/pulsar:4.0.6'
     ports:
       - '6650'
       - '8080'
diff --git a/spring-pulsar-sample-apps/sample-reactive/compose.yaml b/spring-pulsar-sample-apps/sample-reactive/compose.yaml
index d783ce5f..11096d9e 100644
--- a/spring-pulsar-sample-apps/sample-reactive/compose.yaml
+++ b/spring-pulsar-sample-apps/sample-reactive/compose.yaml
@@ -1,6 +1,6 @@
 services:
   pulsar:
-    image: 'apachepulsar/pulsar:4.0.5'
+    image: 'apachepulsar/pulsar:4.0.6'
     ports:
       - '6650'
       - '8080'
diff --git a/spring-pulsar-test/src/main/java/org/springframework/pulsar/test/support/PulsarTestContainerSupport.java b/spring-pulsar-test/src/main/java/org/springframework/pulsar/test/support/PulsarTestContainerSupport.java
index 33285300..aaa81fab 100644
--- a/spring-pulsar-test/src/main/java/org/springframework/pulsar/test/support/PulsarTestContainerSupport.java
+++ b/spring-pulsar-test/src/main/java/org/springframework/pulsar/test/support/PulsarTestContainerSupport.java
@@ -33,7 +33,7 @@ public interface PulsarTestContainerSupport {
 	PulsarContainer PULSAR_CONTAINER = new PulsarContainer(getPulsarImage());
 
 	static DockerImageName getPulsarImage() {
-		return DockerImageName.parse("apachepulsar/pulsar:4.0.5");
+		return DockerImageName.parse("apachepulsar/pulsar:4.0.6");
 	}
 
 	@BeforeAll
diff --git a/tools/pulsar/docker/standalone/pulsar-start.sh b/tools/pulsar/docker/standalone/pulsar-start.sh
index fe90c9de..c53be8b4 100755
--- a/tools/pulsar/docker/standalone/pulsar-start.sh
+++ b/tools/pulsar/docker/standalone/pulsar-start.sh
@@ -3,5 +3,5 @@
 docker run -it -p 6650:6650 -p 8080:8080 \
   --mount source=pulsardata,target=/pulsar/data \
   --mount source=pulsarconf,target=/pulsar/conf \
-  apachepulsar/pulsar:4.0.5 \
+  apachepulsar/pulsar:4.0.6 \
   bin/pulsar standalone