diff --git a/lib/wraith/helpers/utilities.rb b/lib/wraith/helpers/utilities.rb
index 3b851d1a..7018941d 100644
--- a/lib/wraith/helpers/utilities.rb
+++ b/lib/wraith/helpers/utilities.rb
@@ -19,7 +19,7 @@ def convert_to_absolute(filepath)
   elsif filepath[0] == "/"
     # filepath is already absolute. return unchanged
     filepath
-  elsif filepath.match(/^[A-Z]:\/(.+)$/)
+  elsif filepath.match(/^[A-Za-z]:\/(.+)$/)
     # filepath is an absolute Windows path, e.g. C:/Code/Wraith/javascript/global.js. return unchanged
     filepath
   else