diff --git a/README.md b/README.md
index 32ea726..9134862 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ If you're interested in helping, reach out to <pim at ipng dot ch> to disc
 
 ## Building
 
-This program expects Python3 and PIP to be installed. It's known to work on Debian Bullseys and
+This program expects Python3 and PIP to be installed. It's known to work on Debian Bullseye and
 Ubuntu Focal/Jammy.
 
 ```