diff --git a/.gitignore b/.gitignore
index 6d3a5f84..b838ab56 100755
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
+# foundry
+cache/
+out/
+
 # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 
 # dependencies