diff --git a/google-auth-library-java/oauth2_http/pom.xml b/google-auth-library-java/oauth2_http/pom.xml
index e61f5d33fb8a..44342f07559d 100644
--- a/google-auth-library-java/oauth2_http/pom.xml
+++ b/google-auth-library-java/oauth2_http/pom.xml
@@ -121,7 +121,7 @@
         <dependency>
           <groupId>ch.qos.logback</groupId>
           <artifactId>logback-core</artifactId>
-          <version>1.5.25</version>
+          <version>1.5.34</version>
           <scope>test</scope>
         </dependency>
       </dependencies>