diff --git a/polling-publisher/pom.xml b/polling-publisher/pom.xml
index 7cf4c83ba..2e5f7e8f3 100644
--- a/polling-publisher/pom.xml
+++ b/polling-publisher/pom.xml
@@ -98,7 +98,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.5.18</version>
+            <version>1.5.34</version>
         </dependency>
 
     </dependencies>
diff --git a/pom.xml b/pom.xml
index 87aa35d6a..7835110c0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -42,7 +42,7 @@
     <spring-boot.version>3.4.5</spring-boot.version>
     <junit.version>5.11.4</junit.version>
     <mockito.version>5.14.2</mockito.version>
-    <logback.version>1.5.18</logback.version>
+    <logback.version>1.5.34</logback.version>
     <slf4j.version>2.0.17</slf4j.version>
 
     <!-- Other dependencies -->
diff --git a/rate-limiting-pattern/pom.xml b/rate-limiting-pattern/pom.xml
index 2d8d12fdc..c6529d809 100644
--- a/rate-limiting-pattern/pom.xml
+++ b/rate-limiting-pattern/pom.xml
@@ -43,7 +43,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.4.11</version>
+            <version>1.5.34</version>
         </dependency>
 
         <dependency>
diff --git a/subclass-sandbox/pom.xml b/subclass-sandbox/pom.xml
index a22acb7f7..07aea8423 100644
--- a/subclass-sandbox/pom.xml
+++ b/subclass-sandbox/pom.xml
@@ -35,7 +35,7 @@
   <artifactId>subclass-sandbox</artifactId>
   <properties>
     <slf4j.version>2.0.17</slf4j.version>
-    <logback.version>1.5.19</logback.version>
+    <logback.version>1.5.34</logback.version>
   </properties>
   <dependencies>
     <dependency>