diff --git a/release.sh b/release.sh
index 4786e3fb..979ddbb1 100755
--- a/release.sh
+++ b/release.sh
@@ -20,6 +20,7 @@ grunt set_version --release=$1
 
 # build and test
 rm -rf dist
+rm -f browserify-cache*
 npm run build
 grunt test