diff --git a/.travis.yml b/.travis.yml
index ec9f7e5..fed0b77 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ env:
     - LUA=luajit
 
 before_install:
-  - bash .travis/setenv_lua.sh
+  - source .travis/setenv_lua.sh
   - pip install --user cpp-coveralls
   - luarocks install Lua-cURL         --server=https://luarocks.org/dev
   - luarocks install luacov-coveralls --server=https://luarocks.org/dev