diff --git a/java_gen/pre-written/pom.xml b/java_gen/pre-written/pom.xml
index 77ecfb0f..cca30239 100644
--- a/java_gen/pre-written/pom.xml
+++ b/java_gen/pre-written/pom.xml
@@ -63,7 +63,7 @@
     <properties>
         <release>0-SNAPSHOT</release>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <logback.version>1.2.3</logback.version>
+        <logback.version>1.2.9</logback.version>
     </properties>
 
     <dependencies>