diff --git a/.github/workflows/linux_ci.yml b/.github/workflows/linux_ci.yml
index 7ad48e3..a2fab57 100644
--- a/.github/workflows/linux_ci.yml
+++ b/.github/workflows/linux_ci.yml
@@ -7,10 +7,11 @@
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Koral
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up JDK 11
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v4
         with:
+          distribution: 'temurin'
           java-version: 11
 
       - name: Build and install Koral
diff --git a/.github/workflows/windows_ci.yml b/.github/workflows/windows_ci.yml
index 2409e1f..b39de98 100644
--- a/.github/workflows/windows_ci.yml
+++ b/.github/workflows/windows_ci.yml
@@ -11,10 +11,11 @@
           git config --global core.autocrlf false
           git config --global core.eol lf
       - name: Checkout Koral
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up JDK 11
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v4
         with:
+          distribution: 'temurin'
           java-version: 11
 
       - name: Build and install Koral
diff --git a/pom.xml b/pom.xml
index 7b89fc9..64711a8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -39,11 +39,11 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>		
-		<jackson.version>2.16.1</jackson.version>
+		<jackson.version>2.17.0</jackson.version>
 		<antlr4.version>4.9.3</antlr4.version>
 		<antlr3.version>3.5.3</antlr3.version>
 		<java.version>11</java.version>
-		<log4j.version>2.22.1</log4j.version>
+		<log4j.version>2.23.1</log4j.version>
 	</properties>
 	
 	<repositories>
@@ -83,7 +83,7 @@
 		<dependency>
 			<groupId>com.google.guava</groupId>
 			<artifactId>guava</artifactId>
-			<version>33.0.0-jre</version>
+			<version>33.1.0-jre</version>
 		</dependency>
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
@@ -145,12 +145,12 @@
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-api</artifactId>
-			<version>2.0.11</version>
+			<version>2.0.13</version>
 		</dependency>
 		<dependency>
 			<groupId>eu.clarin.sru.fcs</groupId>
 			<artifactId>fcs-simple-endpoint</artifactId>
-			<version>1.6.0</version>
+			<version>1.7.0</version>
 		</dependency>
   </dependencies>
 	<build>
@@ -202,7 +202,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.12.1</version>
+				<version>3.13.0</version>
 				<configuration>
 					<!-- <verbose>true</verbose>
 		          	<fork>true</fork> -->
diff --git a/src/main/java/de/ids_mannheim/korap/query/serialize/Cosmas2QueryProcessor.java b/src/main/java/de/ids_mannheim/korap/query/serialize/Cosmas2QueryProcessor.java
index 285a3e7..a6c7bd9 100644
--- a/src/main/java/de/ids_mannheim/korap/query/serialize/Cosmas2QueryProcessor.java
+++ b/src/main/java/de/ids_mannheim/korap/query/serialize/Cosmas2QueryProcessor.java
@@ -1844,12 +1844,14 @@
             org.antlr.runtime.CommonTokenStream tokens =
                     new org.antlr.runtime.CommonTokenStream(lex); // v3
             
+           // System.out.printf("parseCosmasQuery: tokens = %d\n",  tokens.size());
+           // System.out.printf("parseCosmasQuery: tokens = %s\n",  tokens.toString());
+           
             parser = new c2psParser(tokens);
            
             // Use custom error reporters
             lex.setErrorReporter(errorListener);
             ((c2psParser) parser).setErrorReporter(errorListener);
-
             c2psParser.c2ps_query_return c2Return =
                     ((c2psParser) parser).c2ps_query(); // statt t().
 
diff --git a/src/main/java/de/ids_mannheim/korap/query/serialize/QuerySerializer.java b/src/main/java/de/ids_mannheim/korap/query/serialize/QuerySerializer.java
index edc527e..deaa58e 100644
--- a/src/main/java/de/ids_mannheim/korap/query/serialize/QuerySerializer.java
+++ b/src/main/java/de/ids_mannheim/korap/query/serialize/QuerySerializer.java
@@ -153,6 +153,7 @@
      *            'poliqarpplus', 'cqp', 'cosmas2', 'annis' or 'cql'.
      * @throws IOException
      */
+    
     public void run (String query, String queryLanguage, boolean bDebug) throws IOException {
 
     	ast.verbose = bDebug; // debugging: 01.09.23/FB