diff --git a/source/beamercolorthememetropolis.dtx b/source/beamercolorthememetropolis.dtx
index 949f02a..52710a6 100644
--- a/source/beamercolorthememetropolis.dtx
+++ b/source/beamercolorthememetropolis.dtx
@@ -158,7 +158,7 @@
 \setbeamercolor{progress bar}{%
   use=alerted text,
   fg=alerted text.fg,
-  bg=normal text.bg!50!normal text.fg
+  bg=alerted text.fg!50!black!30
 }
 \setbeamercolor{title separator}{
   use=progress bar,