diff --git a/.travis.yml b/.travis.yml
index 489935b..614cf2e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,6 +28,11 @@ jobs:
 
     - stage: Release
       if: tag IS present
+      script:
+        - curl -O https://www.antlr.org/download/antlr-4.7.1-complete.jar
+        # generate java
+        - java -jar antlr-4.7.1-complete.jar -Xexact-output-dir -o src/java/parcera/antlr -package parcera.antlr -Dlanguage=Java -no-listener -no-visitor src/Clojure.g4
+        - lein do javac, compile, check
       deploy:
         - provider: script
           script: lein deploy clojars
diff --git a/README.md b/README.md
index 19951d9..816500d 100644
--- a/README.md
+++ b/README.md
@@ -50,3 +50,12 @@ this dependency will be in the classpath to avoid collisions.
 (parcera/code [:symbol "ns"])
 ;; "ns"
 ```
+
+## contributing
+
+- To get you setup check the [travis](./.travis.yml) file which
+already contains a full setup from scratch.
+- The project contains a benchmark which should be the decision factor for
+  performance issues inside `parcera`.
+- Please follow [Clojure's Etiquete](https://www.clojure.org/community/etiquette)
+  for issues and pull requests
diff --git a/pom.xml b/pom.xml
index e9ec8cf..a318ad4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
   <groupId>carocad</groupId>
   <artifactId>parcera</artifactId>
   <packaging>jar</packaging>
-  <version>0.4.0</version>
+    <version>0.4.1-SNAPSHOT</version>
   <name>parcera</name>
   <description>Grammar-based Clojure parser</description>
   <url>https://github.com/carocad/parcera</url>
@@ -17,7 +17,7 @@
     <url>https://github.com/carocad/parcera</url>
     <connection>scm:git:git://github.com/carocad/parcera.git</connection>
     <developerConnection>scm:git:ssh://git@github.com/carocad/parcera.git</developerConnection>
-    <tag>4ff04f242eddc4791cfdf2df572f91890c202e6c</tag>
+      <tag>3d33c541bd0f49e46db7db12b23b4e2035eb9fd5</tag>
   </scm>
   <build>
     <sourceDirectory>src/clojure</sourceDirectory>
@@ -51,7 +51,6 @@
             </goals>
             <configuration>
               <sources>
-                <source>src/javascript</source>
                 <source>src/java</source>
               </sources>
             </configuration>
diff --git a/project.clj b/project.clj
index cc778c7..2d100f7 100644
--- a/project.clj
+++ b/project.clj
@@ -1,4 +1,4 @@
-(defproject carocad/parcera "0.4.0"
+(defproject carocad/parcera "0.4.1"
   :description "Grammar-based Clojure parser"
   :url "https://github.com/carocad/parcera"
   :license {:name "LGPLv3"