diff --git a/app.rb b/app.rb
index bd64aa296f1164dd1cda35cf3dd4aa6e7f8cc5df..f1a44a55faa3f37582d2002a268377f53affa56b 100644
--- a/app.rb
+++ b/app.rb
@@ -59,7 +59,7 @@ before do
 end
 
 def append_script_tag(src)
-    @inline_body_script_content <<  "<script type=\"text/javascript\" src="#{src}"></script>\n"
+    @inline_body_script_content <<  "<script type=\"text/javascript\" src=\"#{src}\"></script>\n"
 end
 
 def append_script_declaration(content)