diff --git a/.ci/build.sh b/.ci/build.sh
index 2fcdc49..6a33dde 100755
--- a/.ci/build.sh
+++ b/.ci/build.sh
@@ -2,8 +2,6 @@
 
 # exit immediately if a command fails
 set -e
-source /opt/jdk_switcher/jdk_switcher.sh
-jdk_switcher use oraclejdk9
 java -version
 
 
diff --git a/.travis.yml b/.travis.yml
index 7b8c4d4..1b97822 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,7 @@
 language: java
+jdk:
+  - oraclejdk9
+
 install:
   - true
 script: