diff --git a/.gitignore b/.gitignore
index a0247e5..6de945d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,7 @@
 /sources/
 /tmp/
 /.buildEpoch
+build/
+dist/
+scale_build.egg-info/
+scale_build/__pycache__/
diff --git a/scale_build/utils/manifest.py b/scale_build/utils/manifest.py
index dd1e94d..0abe0f1 100644
--- a/scale_build/utils/manifest.py
+++ b/scale_build/utils/manifest.py
@@ -7,7 +7,7 @@ from scale_build.utils.variables import MANIFEST
 def get_manifest():
     try:
         with open(MANIFEST, 'r') as f:
-            return yaml.load(f.read())
+            return yaml.safe_load(f.read())
     except FileNotFoundError:
         raise MissingManifest()
     except yaml.YAMLError: