diff --git a/appengine-java11/oauth2/pom.xml b/appengine-java11/oauth2/pom.xml
index 4da63c544f6..8cfcbdd0d7e 100644
--- a/appengine-java11/oauth2/pom.xml
+++ b/appengine-java11/oauth2/pom.xml
@@ -57,7 +57,7 @@
       <dependency>
         <groupId>com.google.oauth-client</groupId>
         <artifactId>google-oauth-client</artifactId>
-        <version>1.30.1</version>
+        <version>1.30.4</version>
         <scope>provided</scope>
       </dependency>
 
diff --git a/iot/api-client/codelab/manager/pom.xml b/iot/api-client/codelab/manager/pom.xml
index cf17c1754aa..ed3f8c2eead 100644
--- a/iot/api-client/codelab/manager/pom.xml
+++ b/iot/api-client/codelab/manager/pom.xml
@@ -77,7 +77,7 @@
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client</artifactId>
-      <version>1.30.1</version>
+      <version>1.30.4</version>
     </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>
diff --git a/iot/api-client/end-to-end-example/pom.xml b/iot/api-client/end-to-end-example/pom.xml
index 0a81d8f5bfd..97c1ad4991d 100644
--- a/iot/api-client/end-to-end-example/pom.xml
+++ b/iot/api-client/end-to-end-example/pom.xml
@@ -68,7 +68,7 @@
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client</artifactId>
-      <version>1.30.1</version>
+      <version>1.30.4</version>
     </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>
diff --git a/iot/api-client/manager/pom.xml b/iot/api-client/manager/pom.xml
index be2a8b14bbb..3a027eaf1dc 100644
--- a/iot/api-client/manager/pom.xml
+++ b/iot/api-client/manager/pom.xml
@@ -72,7 +72,7 @@
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client</artifactId>
-      <version>1.30.1</version>
+      <version>1.30.4</version>
     </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>