diff --git a/.travis.yml b/.travis.yml
index 5a81240..b0d3497 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,8 +9,8 @@ addons:
       - gcc-7
       - cppcheck
 before_install:
-	- sudo add-apt-repository ppa:team-gcc-arm-embedded/ppa
-	- sudo apt-get update -q
+    - sudo add-apt-repository ppa:team-gcc-arm-embedded/ppa
+    - sudo apt-get update -q
 	- sudo apt-get install -y gcc-arm-embedded
 script:
   - export CC=gcc-7