diff --git a/Dockerfile b/Dockerfile
index 98fb7a4..f3d1874 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,5 +18,7 @@ RUN go get -u github.com/golang/lint/golint
 WORKDIR /go/src/github.com/buger/gor/
 ADD . /go/src/github.com/buger/gor/
 
-RUN javac -cp /tmp/commons-io-2.4/commons-io-2.4.jar ./examples/middleware/echo.java
+RUN wget http://archive.apache.org/dist/commons/io/binaries/commons-io-2.4-bin.tar.gz && tar xzf commons-io-2.4-bin.tar.gz && cd commons-io-2.4 && mv commons-io-2.4.jar /tmp/
+RUN wget http://archive.apache.org/dist/commons/codec/binaries/commons-codec-1.9-bin.tar.gz && tar xzf commons-codec-1.9-bin.tar.gz
+RUN javac -cp commons-io-2.4/commons-io-2.4.jar -cp commons-codec-1.9/commons-codec-1.9.jar ./examples/middleware/echo.java
 RUN go get
\ No newline at end of file
diff --git a/examples/middleware/echo.java b/examples/middleware/echo.java
index ffa885c..9fba333 100644
--- a/examples/middleware/echo.java
+++ b/examples/middleware/echo.java
@@ -6,19 +6,19 @@ import org.apache.commons.codec.DecoderException;
 import org.apache.commons.codec.binary.Hex;
 
 
-public class Echo {
-        public static String decodeHexString(String s) throws DecoderException {
-            return new String(Hex.decodeHex(s.toCharArray()));
-        }
+class Echo {
+    public static String decodeHexString(String s) throws DecoderException {
+        return new String(Hex.decodeHex(s.toCharArray()));
+    }
 
-        public static String encodeHexString(String s) {
-            return new String(Hex.encodeHex(s.getBytes()));
-        }
+    public static String encodeHexString(String s) {
+        return new String(Hex.encodeHex(s.getBytes()));
+    }
 
-        public static String transformHTTPMessage(String req) {
-            // do actual transformations here
-            return req;
-        }
+    public static String transformHTTPMessage(String req) {
+        // do actual transformations here
+        return req;
+    }
 
     public static void main(String[] args) throws DecoderException {
         if(args != null){
@@ -29,7 +29,7 @@ public class Echo {
         }
 
         BufferedReader stdin = new BufferedReader(new InputStreamReader(
-                System.in));
+                                                                        System.in));
         String line = null;
 
         try {