diff --git a/java-dialogflow/samples/install-without-bom/pom.xml b/java-dialogflow/samples/install-without-bom/pom.xml
index 00101a15539..862e860442c 100644
--- a/java-dialogflow/samples/install-without-bom/pom.xml
+++ b/java-dialogflow/samples/install-without-bom/pom.xml
@@ -36,7 +36,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.8.14</version>
+      <version>2.8.15</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>
diff --git a/java-dialogflow/samples/snapshot/pom.xml b/java-dialogflow/samples/snapshot/pom.xml
index ad653c99f1a..98354d14903 100644
--- a/java-dialogflow/samples/snapshot/pom.xml
+++ b/java-dialogflow/samples/snapshot/pom.xml
@@ -34,7 +34,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.8.14</version>
+      <version>2.8.15</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>
diff --git a/java-dialogflow/samples/snippets/pom.xml b/java-dialogflow/samples/snippets/pom.xml
index a281de0f468..760f9d91de3 100644
--- a/java-dialogflow/samples/snippets/pom.xml
+++ b/java-dialogflow/samples/snippets/pom.xml
@@ -47,7 +47,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.8.14</version>
+      <version>2.8.15</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>