Set jarsigner-version to 1.3.1

framework/pom.xml

diff --git a/framework/pom.xml b/framework/pom.xml
index 8fb851b..4f71826 100644
--- a/framework/pom.xml
+++ b/framework/pom.xml
@@ -134,7 +134,7 @@
 					<plugin>
 						<groupId>org.eclipse.cbi.maven.plugins</groupId>
 						<artifactId>eclipse-jarsigner-plugin</artifactId>
-						<version>1.1.3</version>
+						<version>1.3.1</version>
 						<executions>
 							<execution>
 								<id>sign</id>

load_generator/pom.xml

diff --git a/load_generator/pom.xml b/load_generator/pom.xml
index 912dcfa..db2937d 100644
--- a/load_generator/pom.xml
+++ b/load_generator/pom.xml
@@ -193,7 +193,7 @@
 					<plugin>
 						<groupId>org.eclipse.cbi.maven.plugins</groupId>
 						<artifactId>eclipse-jarsigner-plugin</artifactId>
-						<version>1.1.3</version>
+						<version>1.3.1</version>
 						<executions>
 							<execution>
 								<id>sign</id>

simulation_generator/app4mc.sim/pom.xml

diff --git a/simulation_generator/app4mc.sim/pom.xml b/simulation_generator/app4mc.sim/pom.xml
index dbd00c6..bb02179 100644
--- a/simulation_generator/app4mc.sim/pom.xml
+++ b/simulation_generator/app4mc.sim/pom.xml
@@ -193,7 +193,7 @@
 					<plugin>
 						<groupId>org.eclipse.cbi.maven.plugins</groupId>
 						<artifactId>eclipse-jarsigner-plugin</artifactId>
-						<version>1.1.3</version>
+						<version>1.3.1</version>
 						<executions>
 							<execution>
 								<id>sign</id>