diff --git a/start.sh b/start.sh
index 21c42bfe..4f9900b7 100644
--- a/start.sh
+++ b/start.sh
@@ -32,18 +32,15 @@ if [ ! -z $HTTP_PORT ] ; then
 fi
 
 if [ ! -z $CDNJS ]; then
-    cdnjs=${CDNJS/\/\//\\/\\/}
-    sed -i "s/^cdnjs.*/cdnjs=$cdnjs/g" conf/app.conf
+    sed -i "s#^cdnjs.*#cdnjs=$CDNJS#g" conf/app.conf
 fi
 
 if [ ! -z $CDNCSS ]; then
-    cdncss=${CDNCSS/\/\//\\/\\/}
-    sed -i "s/^cdncss.*/cdncss=$cdnjs/g" conf/app.conf
+    sed -i "s#^cdncss.*#cdncss=$CDNCSS#g" conf/app.conf
 fi
 
 if [ ! -z $CDN ]; then
-    cdn=${CDN/\/\//\\/\\/}
-    sed -i "s/^cdn.*/cdn=$cdn/g" conf/app.conf
+    sed -i "s#^cdn.*#cdn=$CDN#g" conf/app.conf
 fi
 
 sed -i 's/^runmode.*/runmode=prod/g' conf/app.conf