diff --git a/browser-extensions/chrome/build.sh b/browser-extensions/chrome/build.sh
index 5cf5c430a..5d3f54e7f 100644
--- a/browser-extensions/chrome/build.sh
+++ b/browser-extensions/chrome/build.sh
@@ -57,6 +57,7 @@ checkOK
 # Zipping chrome-extension
 echo "${OpenColor}${Green}* Zipping all chrome-extension files...${CloseColor}"
 cd $BUILDDIR
+rm $ZIPFILE
 zip -qr $ZIPFILE "`basename $APPDIR`"
 checkOK
 
diff --git a/browser-extensions/exclude b/browser-extensions/exclude
index 80d4b5483..3689c0576 100644
--- a/browser-extensions/exclude
+++ b/browser-extensions/exclude
@@ -16,3 +16,4 @@ lib/bitcore/coverage
 lib/bitcore/build
 .git
 tests
+.*