diff --git a/java-showcase/gapic-showcase/pom.xml b/java-showcase/gapic-showcase/pom.xml
index dacff71ad3d1..4942d96306c6 100644
--- a/java-showcase/gapic-showcase/pom.xml
+++ b/java-showcase/gapic-showcase/pom.xml
@@ -19,8 +19,8 @@
   <properties>
     <gapic-showcase.version>0.44.0</gapic-showcase.version>
     <!-- This is the last version supporting slf4j 1.x, do not upgrade -->
-    <slf4j1-logback.version>1.2.13</slf4j1-logback.version>
-    <slf4j2-logback.version>1.5.25</slf4j2-logback.version>
+    <slf4j1-logback.version>1.5.34</slf4j1-logback.version>
+    <slf4j2-logback.version>1.5.34</slf4j2-logback.version>
   </properties>
 
   <build>