diff --git a/.gitignore b/.gitignore
index e12f215..9b4422d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 *.so
 *.dylib
 /arfc/arfc
+playground/
 
 # Test binary, built with `go test -c`
 *.test