diff --git a/backend/mmmail-server/pom.xml b/backend/mmmail-server/pom.xml
index 7e2757ba..fef37648 100644
--- a/backend/mmmail-server/pom.xml
+++ b/backend/mmmail-server/pom.xml
@@ -214,7 +214,7 @@
         <dependency>
             <groupId>com.google.zxing</groupId>
             <artifactId>javase</artifactId>
-            <version>3.5.3</version>
+            <version>3.5.4</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>