diff --git a/web_app/css/sif-tools.css b/web_app/css/sif_tools.css
similarity index 100%
rename from web_app/css/sif-tools.css
rename to web_app/css/sif_tools.css
diff --git a/web_app/sif_tools.html b/web_app/sif_tools.html
index 5e64cf6..f9c0a67 100644
--- a/web_app/sif_tools.html
+++ b/web_app/sif_tools.html
@@ -10,7 +10,7 @@
   <link href="css/external/jquery-ui.css" rel="stylesheet">
   <link href="css/external/jquery.timepicker.css" rel="stylesheet">
   <link href="css/external/jquery.keypad.css" rel="stylesheet">
-  <link href="css/sif-tools.css" rel="stylesheet">
+  <link href="css/sif_tools.css" rel="stylesheet">
   <script src="js/external/jquery.js"></script>
   <script src="js/external/jquery.plugin.js"></script> 
   <script src="js/external/jquery.keypad.js"></script>