diff --git a/.travis.yml b/.travis.yml
index 614cf2e..e9dd5e7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,8 +7,6 @@ branches:
     - /^v\d+\.\d+(\.\d+)?(-\S*)?$/
 
 language: generic
-jdk:
-  - openjdk8
 
 jobs:
   include:
diff --git a/pom.xml b/pom.xml
index a318ad4..65202b6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
   <groupId>carocad</groupId>
   <artifactId>parcera</artifactId>
   <packaging>jar</packaging>
-    <version>0.4.1-SNAPSHOT</version>
+    <version>0.4.2</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>3d33c541bd0f49e46db7db12b23b4e2035eb9fd5</tag>
+      <tag>faf7cc8631e665c408bb94cb806059008135104a</tag>
   </scm>
   <build>
     <sourceDirectory>src/clojure</sourceDirectory>
diff --git a/project.clj b/project.clj
index 2d100f7..567d2df 100644
--- a/project.clj
+++ b/project.clj
@@ -1,10 +1,11 @@
-(defproject carocad/parcera "0.4.1"
+(defproject carocad/parcera "0.4.2"
   :description "Grammar-based Clojure parser"
   :url "https://github.com/carocad/parcera"
   :license {:name "LGPLv3"
             :url  "https://github.com/carocad/parcera/blob/master/LICENSE.md"}
   :source-paths ["src/clojure"]
   :java-source-paths ["src/java"]
+  :javac-options ["-target" "1.8" "-source" "1.8"]
   :dependencies [[org.clojure/clojure "1.10.1"]]
   :profiles {:dev      {:dependencies   [[criterium/criterium "0.4.5"] ;; benchmark
                                          [org.clojure/test.check "0.10.0"]] ;; generative testing