Fix indent.
diff --git a/.travis/install.sh b/.travis/install.sh
index 0ff3ec7..fdb97cf 100755
--- a/.travis/install.sh
+++ b/.travis/install.sh
@@ -17,7 +17,7 @@
     fi
 
     if which pyenv > /dev/null; then
-	eval "$(pyenv init -)"
+        eval "$(pyenv init -)"
     fi
 
     case "${TOX_ENV}" in