diff --git a/scripts/build-js.sh b/scripts/build-js.sh
index 9f8547be..e2b44c57 100755
--- a/scripts/build-js.sh
+++ b/scripts/build-js.sh
@@ -110,6 +110,7 @@ rm -rf src
 ../scripts/smap-out.py dygraph.min.tmp.js /dev/null dygraph.min.tmp.js.map
 
 uglifyjs \
+    --no-module --v8 --webkit \
     --compress \
     --mangle \
     --output-opts "preamble='$header'" \