diff --git a/.gitignore b/.gitignore
index 4731c43..f11c7bb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,4 @@ bin
 lib
 .rust
 target
+Cargo.lock
diff --git a/.travis.yml b/.travis.yml
index d1649fc..58dfe29 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,6 +13,6 @@ before_script:
   - cargo -V
 script:
   - cargo build -v
-  - cd src/sdl_mixer && cargo build -v
-  - cd src/sdl_image && cargo build -v
-  - cd src/sdl-demo && cargo build -v
+  - (cd src/sdl_mixer && cargo build -v)
+  - (cd src/sdl_image && cargo build -v)
+  - (cd src/sdl-demo && cargo build -v)