diff --git a/SynchronizedPDS/pom.xml b/SynchronizedPDS/pom.xml
index 22f4a818..004dcc2a 100644
--- a/SynchronizedPDS/pom.xml
+++ b/SynchronizedPDS/pom.xml
@@ -50,7 +50,7 @@
 		<dependency>
 		    <groupId>org.slf4j</groupId>
 		    <artifactId>slf4j-log4j12</artifactId>
-		    <version>1.7.30</version>
+		    <version>1.7.31</version>
 		    <scope>test</scope>
 		</dependency>	
 	</dependencies>
diff --git a/boomerangPDS/pom.xml b/boomerangPDS/pom.xml
index 4d4615ae..e97890b7 100644
--- a/boomerangPDS/pom.xml
+++ b/boomerangPDS/pom.xml
@@ -76,7 +76,7 @@
 		<dependency>
 		    <groupId>org.slf4j</groupId>
 		    <artifactId>slf4j-log4j12</artifactId>
-		    <version>1.7.30</version>
+		    <version>1.7.31</version>
 		    <scope>test</scope>
 		</dependency>	
 	</dependencies>
diff --git a/idealPDS/pom.xml b/idealPDS/pom.xml
index ad6790da..60287117 100644
--- a/idealPDS/pom.xml
+++ b/idealPDS/pom.xml
@@ -70,7 +70,7 @@
 		<dependency>
 		    <groupId>org.slf4j</groupId>
 		    <artifactId>slf4j-log4j12</artifactId>
-		    <version>1.7.30</version>
+		    <version>1.7.31</version>
 		    <scope>test</scope>
 		</dependency>	
     </dependencies>