diff --git a/pom.jdk8.xml b/pom.jdk8.xml
index 7a463c6..3c63cf4 100644
--- a/pom.jdk8.xml
+++ b/pom.jdk8.xml
@@ -57,7 +57,6 @@
     <!-- Please keep the jetty version identical with the docker image -->
     <jetty.version>11.0.7</jetty.version>
     <codemirror.version>5.63.0</codemirror.version>
-    <slf4j.version>1.7.32</slf4j.version>
 
     <!-- dependencies -->
     <jstl.version>1.2</jstl.version>
@@ -69,9 +68,7 @@
     <jlatexmath.version>1.0.7</jlatexmath.version>
     <jlatexmath-font-greek.version>${jlatexmath.version}</jlatexmath-font-greek.version>
     <jlatexmath-font-cyrillic.version>${jlatexmath.version}</jlatexmath-font-cyrillic.version>
-    <!-- Logging -->
-    <slf4j-log4j12.version>${slf4j.version}</slf4j-log4j12.version>
-    <slf4j-api.version>${slf4j.version}</slf4j-api.version>
+
     <!-- Testing -->
     <junit.version>4.13.2</junit.version>
     <htmlunit.version>2.53.0</htmlunit.version>
@@ -169,17 +166,7 @@
       <artifactId>jlatexmath-font-cyrillic</artifactId>
       <version>${jlatexmath-font-cyrillic.version}</version>
     </dependency>
-    <!-- Logging -->
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-log4j12</artifactId>
-      <version>${slf4j-log4j12.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-api</artifactId>
-      <version>${slf4j-api.version}</version>
-    </dependency>
+
     <!-- Testing -->
     <dependency>
       <groupId>junit</groupId>
diff --git a/pom.xml b/pom.xml
index 2049667..882ef3f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -57,7 +57,6 @@
     <!-- Please keep the jetty version identical with the docker image -->
     <jetty.version>11.0.7</jetty.version>
     <codemirror.version>5.63.0</codemirror.version>
-    <slf4j.version>1.7.32</slf4j.version>
 
     <!-- dependencies -->
     <jstl.version>1.2</jstl.version>
@@ -69,9 +68,7 @@
     <jlatexmath.version>1.0.7</jlatexmath.version>
     <jlatexmath-font-greek.version>${jlatexmath.version}</jlatexmath-font-greek.version>
     <jlatexmath-font-cyrillic.version>${jlatexmath.version}</jlatexmath-font-cyrillic.version>
-    <!-- Logging -->
-    <slf4j-log4j12.version>${slf4j.version}</slf4j-log4j12.version>
-    <slf4j-api.version>${slf4j.version}</slf4j-api.version>
+
     <!-- Testing -->
     <junit.version>4.13.2</junit.version>
     <htmlunit.version>2.53.0</htmlunit.version>
@@ -147,18 +144,8 @@
       <artifactId>jlatexmath-font-cyrillic</artifactId>
       <version>${jlatexmath-font-cyrillic.version}</version>
     </dependency>
-    <!-- Logging -->
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-log4j12</artifactId>
-      <version>${slf4j-log4j12.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-api</artifactId>
-      <version>${slf4j-api.version}</version>
-    </dependency>
-    <!-- Testing -->
+ 
+   <!-- Testing -->
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
diff --git a/src/test/java/net/sourceforge/plantuml/servlet/WebappTestCase.java b/src/test/java/net/sourceforge/plantuml/servlet/WebappTestCase.java
index 6201650..23030da 100644
--- a/src/test/java/net/sourceforge/plantuml/servlet/WebappTestCase.java
+++ b/src/test/java/net/sourceforge/plantuml/servlet/WebappTestCase.java
@@ -8,9 +8,6 @@ import java.io.InputStreamReader;
 import java.net.URL;
 import java.net.URLConnection;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import junit.framework.TestCase;
 import net.sourceforge.plantuml.servlet.server.EmbeddedJettyServer;
 import net.sourceforge.plantuml.servlet.server.ExternalServer;
@@ -19,8 +16,6 @@ import net.sourceforge.plantuml.servlet.server.ServerUtils;
 
 public abstract class WebappTestCase extends TestCase {
 
-    protected final Logger logger;
-
     private final ServerUtils serverUtils;
 
     public WebappTestCase() {
@@ -29,26 +24,26 @@ public abstract class WebappTestCase extends TestCase {
 
     public WebappTestCase(String name) {
         super(name);
-        logger = LoggerFactory.getLogger(this.getClass());
+        // logger = LoggerFactory.getLogger(this.getClass());
 
         String uri = System.getProperty("system.test.server", "");
         //uri = "http://localhost:8080/plantuml";
         if (!uri.isEmpty()) {
             // mvn test -DskipTests=false -DargLine="-Dsystem.test.server=http://localhost:8080/plantuml"
-            logger.info("Test against external server: " + uri);
+            // logger.info("Test against external server: " + uri);
             serverUtils = new ExternalServer(uri);
             return;
         }
 
         // mvn test -DskipTests=false
-        logger.info("Test against embedded jetty server.");
+        // logger.info("Test against embedded jetty server.");
         serverUtils = new EmbeddedJettyServer();
     }
 
     @Override
     public void setUp() throws Exception {
         serverUtils.startServer();
-        logger.info(getServerUrl());
+        // logger.info(getServerUrl());
     }
 
     @Override