diff --git a/google-cloud-jar-parent/pom.xml b/google-cloud-jar-parent/pom.xml
index e824958cf545..4b23b7882751 100644
--- a/google-cloud-jar-parent/pom.xml
+++ b/google-cloud-jar-parent/pom.xml
@@ -86,7 +86,7 @@
       <dependency>
         <groupId>ch.qos.logback</groupId>
         <artifactId>logback-core</artifactId>
-        <version>1.5.33</version>
+        <version>1.5.35</version>
         <scope>test</scope>
       </dependency>
       <dependency>
diff --git a/java-logging-logback/pom.xml b/java-logging-logback/pom.xml
index 1e36cdf89973..7b100366df17 100644
--- a/java-logging-logback/pom.xml
+++ b/java-logging-logback/pom.xml
@@ -14,7 +14,7 @@
   </description>
 
   <properties>
-    <logback.version>1.2.13</logback.version>
+    <logback.version>1.5.35</logback.version>
     <easymock.version>5.6.0</easymock.version>
     <truth.version>1.4.4</truth.version>
     <logging.version>3.25.0</logging.version>