diff --git a/build.gradle b/build.gradle
index 95e1f88185e2a2be65cde5ca0f479b8159a3a530..b58471174552cdde730a4a132f9441a711a66574 100644
--- a/build.gradle
+++ b/build.gradle
@@ -35,7 +35,7 @@ project(':de.prob.core') {
 		mavenCentral()
 	}
 
-	def parser_version = '2.5.6'
+	def parser_version = '2.9.23'
 
 	dependencies {
 		// Note: After changing/updating dependencies or their versions here,
diff --git a/de.prob.core/.classpath b/de.prob.core/.classpath
index 1b66128a95ad0d545d88e7dda54aa288d727bc15..7bc91a4592a2c3f435815d2fc99c01a2c9082c94 100644
--- a/de.prob.core/.classpath
+++ b/de.prob.core/.classpath
@@ -8,19 +8,19 @@
 	Note: These dependencies are downloaded using Gradle.
 	To change/update dependencies, you need to update the build.gradle, the META-INF/MANIFEST.MF, and this list.
 	-->
-	<classpathentry exported="true" kind="lib" path="lib/dependencies/answerparser-2.5.6.jar"/>
-	<classpathentry exported="true" kind="lib" path="lib/dependencies/bparser-2.5.6.jar"/>
+	<classpathentry exported="true" kind="lib" path="lib/dependencies/answerparser-2.9.23.jar"/>
+	<classpathentry exported="true" kind="lib" path="lib/dependencies/bparser-2.9.23.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/dependencies/commons-codec-1.8.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/dependencies/commons-lang-2.6.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/dependencies/jna-3.4.0.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/dependencies/jsr305-1.3.9.jar"/>
-	<classpathentry exported="true" kind="lib" path="lib/dependencies/ltlparser-2.5.6.jar"/>
+	<classpathentry exported="true" kind="lib" path="lib/dependencies/ltlparser-2.9.23.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/dependencies/mxparser-1.2.2.jar"/>
-	<classpathentry exported="true" kind="lib" path="lib/dependencies/parserbase-2.5.6.jar"/>
-	<classpathentry exported="true" kind="lib" path="lib/dependencies/prologlib-2.5.6.jar"/>
+	<classpathentry exported="true" kind="lib" path="lib/dependencies/parserbase-2.9.23.jar"/>
+	<classpathentry exported="true" kind="lib" path="lib/dependencies/prologlib-2.9.23.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/dependencies/ptolemy-jfmi-1.1.0.jar"/>
-	<classpathentry exported="true" kind="lib" path="lib/dependencies/theorymapping-2.5.6.jar"/>
-	<classpathentry exported="true" kind="lib" path="lib/dependencies/unicode-2.5.6.jar"/>
+	<classpathentry exported="true" kind="lib" path="lib/dependencies/theorymapping-2.9.23.jar"/>
+	<classpathentry exported="true" kind="lib" path="lib/dependencies/unicode-2.9.23.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/dependencies/xmlpull-1.1.3.1.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/dependencies/xstream-1.4.19.jar"/>
 </classpath>
diff --git a/de.prob.core/META-INF/MANIFEST.MF b/de.prob.core/META-INF/MANIFEST.MF
index 8a5fd5c2bca12cd7b2c6a35939f3004267021641..c4da0c4ae943f295a343f75e04542e254ce0c191 100644
--- a/de.prob.core/META-INF/MANIFEST.MF
+++ b/de.prob.core/META-INF/MANIFEST.MF
@@ -116,13 +116,13 @@ Bundle-Activator: de.prob.core.internal.Activator
 Eclipse-BuddyPolicy: registered
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Bundle-ClassPath: .,
- lib/dependencies/unicode-2.5.6.jar,
- lib/dependencies/theorymapping-2.5.6.jar,
- lib/dependencies/prologlib-2.5.6.jar,
- lib/dependencies/parserbase-2.5.6.jar,
- lib/dependencies/ltlparser-2.5.6.jar,
- lib/dependencies/bparser-2.5.6.jar,
- lib/dependencies/answerparser-2.5.6.jar,
+ lib/dependencies/unicode-2.9.23.jar,
+ lib/dependencies/theorymapping-2.9.23.jar,
+ lib/dependencies/prologlib-2.9.23.jar,
+ lib/dependencies/parserbase-2.9.23.jar,
+ lib/dependencies/ltlparser-2.9.23.jar,
+ lib/dependencies/bparser-2.9.23.jar,
+ lib/dependencies/answerparser-2.9.23.jar,
  lib/dependencies/ptolemy-jfmi-1.1.0.jar,
  lib/dependencies/xstream-1.4.19.jar,
  lib/dependencies/commons-codec-1.8.jar,