diff --git a/README.md b/README.md
index 60e84a5..a54ffd8 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,6 @@ Files
 
 * adressenmeister.d64: The full disc image file
 * adressenmeister.prg: The original prg-file rescued from a floppy disc
-* adressenmeister.txt: A text-converted version of the source code
+* adressenmeister.bas: A text-converted version of the source code
 
 More on http://blogs.fsfe.org/clemens
diff --git a/adressenmeister.txt b/adressenmeister.bas
similarity index 100%
rename from adressenmeister.txt
rename to adressenmeister.bas