diff --git a/.travis.yml b/.travis.yml
index 58143f420..e6faa14bb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -56,11 +56,11 @@ matrix:
       jdk: oraclejdk7
       env: TARGET=python3
       addons:
-	apt:
-	  sources:
-	    - deadsnakes # source required so it finds the package definition below
-	  packages:
-	    - python3.5
+        apt:
+          sources:
+            - deadsnakes # source required so it finds the package definition below
+          packages:
+            - python3.5
     - os: linux
       jdk: oraclejdk7
       env: TARGET=javascript