diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index 155e04a22..444c5c709 100644
--- a/samples/install-without-bom/pom.xml
+++ b/samples/install-without-bom/pom.xml
@@ -80,7 +80,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.5.4</version>
+      <version>2.5.6</version>
       <classifier>tests</classifier>
     </dependency>
   </dependencies>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index 139d0c146..fa976de8e 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -79,7 +79,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.5.4</version>
+      <version>2.5.6</version>
       <classifier>tests</classifier>
     </dependency>
   </dependencies>
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index acb33fa56..01f343c68 100644
--- a/samples/snippets/pom.xml
+++ b/samples/snippets/pom.xml
@@ -90,7 +90,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.5.4</version>
+      <version>2.5.6</version>
       <classifier>tests</classifier>
     </dependency>
     <!-- [END_EXCLUDE] -->