diff --git a/pom.xml b/pom.xml
index 6ffa599..8d8a222 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>de.srsoftware</groupId>
 	<artifactId>web4rail</artifactId>
-	<version>0.11.19</version>
+	<version>0.11.20</version>
 	<name>Web4Rail</name>
 	<packaging>jar</packaging>
 	<description>Java Model Railway Control</description>
diff --git a/resources/logback.xml b/resources/logback.xml
index 0a48ec6..79b2091 100644
--- a/resources/logback.xml
+++ b/resources/logback.xml
@@ -7,7 +7,7 @@
   </appender>
   
   <logger name="de.srsoftware.web4rail" level="DEBUG"/>
-  <logger name="de.srsoftware.web4rail.Application" level="INFO"/>
+  <logger name="de.srsoftware.web4rail.Application" level="DEBUG"/>
   <logger name="de.srsoftware.web4rail.Command" level="INFO"/>
   <logger name="de.srsoftware.web4rail.ControlUnit" level="INFO"/>
   
diff --git a/src/main/java/de/srsoftware/web4rail/Application.java b/src/main/java/de/srsoftware/web4rail/Application.java
index 1ae2ce6..1fe6a00 100644
--- a/src/main/java/de/srsoftware/web4rail/Application.java
+++ b/src/main/java/de/srsoftware/web4rail/Application.java
@@ -8,13 +8,17 @@ import java.io.IOException;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.lang.reflect.InvocationTargetException;
+import java.net.FileNameMap;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.URI;
+import java.net.URLConnection;
 import java.net.URLDecoder;
 import java.nio.file.Files;
 import java.util.Date;
 import java.util.HashMap;
+import java.util.List;
+import java.util.Vector;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -206,10 +210,9 @@ public class Application extends BaseClass{
 		File file = new File(System.getProperty("user.dir")+"/resources"+uri);
 		LOG.debug("requesting file: {}",file);
 		if (file.exists()) {
-			LOG.debug("found...");
-			String ct = Files.probeContentType(file.toPath());
-			LOG.debug("Content-Type: {}",ct);
-			client.getResponseHeaders().add("Content-Type", ct);
+			String mime = mimeOf(file);
+			LOG.debug("Mime type: {}",mime);
+			client.getResponseHeaders().add("Content-Type", mime);
 			LOG.debug("Length: {}",file.length());
 			client.sendResponseHeaders(200, file.length());
 			LOG.debug("Sent headers...");
@@ -226,6 +229,18 @@ public class Application extends BaseClass{
 		sendError(client,404,t("Could not find \"{}\"",uri));
 	}
 	
+	private static String mimeOf(File file) throws IOException {
+		String[] parts = file.toString().split("\\.");
+		switch (parts[parts.length-1].toLowerCase()) {
+		case "js":
+			return "application/javascript";
+		case "css":
+			return "text/css";
+		}
+		LOG.warn("No conten type stored for {}!",file);
+		return Files.probeContentType(file.toPath());
+	}
+
 	/**
 	 * sends a response to a given client
 	 * @param client