diff --git a/OCPP-J/pom.xml b/OCPP-J/pom.xml
index a85e9033..c84c6e95 100644
--- a/OCPP-J/pom.xml
+++ b/OCPP-J/pom.xml
@@ -84,7 +84,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.3.16</version>
+            <version>1.5.21</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/ocpp-common/pom.xml b/ocpp-common/pom.xml
index ecb6f5ce..0b64af2d 100644
--- a/ocpp-common/pom.xml
+++ b/ocpp-common/pom.xml
@@ -66,7 +66,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.3.16</version>
+            <version>1.5.21</version>
             <scope>test</scope>
         </dependency>
 
diff --git a/ocpp-v1_6-test/pom.xml b/ocpp-v1_6-test/pom.xml
index 14ab7c03..bfde18c0 100644
--- a/ocpp-v1_6-test/pom.xml
+++ b/ocpp-v1_6-test/pom.xml
@@ -83,7 +83,7 @@
 		<dependency>
 		    <groupId>ch.qos.logback</groupId>
 		    <artifactId>logback-classic</artifactId>
-		    <version>1.3.16</version>
+		    <version>1.5.21</version>
 		    <scope>test</scope>
 		</dependency>
 		<dependency>
diff --git a/ocpp-v1_6/pom.xml b/ocpp-v1_6/pom.xml
index 1fab4031..b2b89b52 100644
--- a/ocpp-v1_6/pom.xml
+++ b/ocpp-v1_6/pom.xml
@@ -83,7 +83,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.3.16</version>
+            <version>1.5.21</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/ocpp-v2-test/pom.xml b/ocpp-v2-test/pom.xml
index 89561660..ca5c4a32 100644
--- a/ocpp-v2-test/pom.xml
+++ b/ocpp-v2-test/pom.xml
@@ -109,7 +109,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.3.16</version>
+            <version>1.5.21</version>
             <scope>test</scope>
         </dependency>
         <dependency>
diff --git a/ocpp-v2/pom.xml b/ocpp-v2/pom.xml
index 6ee011e7..b08c2335 100644
--- a/ocpp-v2/pom.xml
+++ b/ocpp-v2/pom.xml
@@ -93,7 +93,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.3.16</version>
+            <version>1.5.21</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/ocpp-v2_0-test/pom.xml b/ocpp-v2_0-test/pom.xml
index ab6576d2..c63ca812 100644
--- a/ocpp-v2_0-test/pom.xml
+++ b/ocpp-v2_0-test/pom.xml
@@ -84,7 +84,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.3.16</version>
+            <version>1.5.21</version>
             <scope>test</scope>
         </dependency>
         <dependency>