diff --git a/.travis.yml b/.travis.yml
index 0d18c3c..78fa8d1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,3 @@
 language: java
 jdk:
   - oraclejdk9
-  - openjdk8
diff --git a/pom.xml b/pom.xml
index 00391f9..dd5cf57 100644
--- a/pom.xml
+++ b/pom.xml
@@ -68,8 +68,8 @@
             <artifactId>maven-compiler-plugin</artifactId> 
             <version>3.7.0</version> 
             <configuration> 
-                <source>10</source> 
-                <target>10</target> 
+                <source>9</source> 
+                <target>9</target> 
                 <showWarnings>true</showWarnings> 
                 <showDeprecation>true</showDeprecation> 
             </configuration>