diff --git a/.travis.yml b/.travis.yml
index 0d370bd3..3f4905b9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ language: java
 jdk:
   - openjdk7
   - oraclejdk8
+  - oraclejdk9
 
 before_install:
   - export BUILD_COVERAGE="$([ $TRAVIS_JDK_VERSION == 'oraclejdk8' ] && echo 'true')"
diff --git a/pom.xml b/pom.xml
index 8b64e759..f2871e2a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -80,7 +80,7 @@
         <maven.jar.version>3.0.2</maven.jar.version>
         <maven.compiler.version>3.6.1</maven.compiler.version>
 
-        <jdk.version>1.8</jdk.version>
+        <jdk.version>1.7</jdk.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <buildNumber>${user.name}-${maven.build.timestamp}</buildNumber>