diff --git a/cloud-functions/pom.xml b/cloud-functions/pom.xml
index e2712bd..6f991ee 100644
--- a/cloud-functions/pom.xml
+++ b/cloud-functions/pom.xml
@@ -241,7 +241,7 @@
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-classic</artifactId>
-      <version>1.4.6</version>
+      <version>1.4.12</version>
     </dependency>
     <!-- https://mvnrepository.com/artifact/junit/junit -->
     <dependency>