diff --git a/.travis.yml b/.travis.yml
index c953a07cf..aebcc220b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,10 +5,10 @@ language: cpp
 
 matrix:
   include:
-  	- os: linux
+    - os: linux
       dist: trusty
-	  sudo: required
-	  compiler: gcc
+      sudo: required
+      compiler: gcc
     - os: osx
       osx_image: xcode9.3
       compiler: clang