diff --git a/include/patchlevel.h b/include/patchlevel.h
index 8034d40d4..9dde5579e 100644
--- a/include/patchlevel.h
+++ b/include/patchlevel.h
@@ -36,7 +36,7 @@
 #define DEBUG
 #endif
 
-#define COPYRIGHT_BANNER_A "NetHack, Copyright 1985-2025"
+#define COPYRIGHT_BANNER_A "NetHack, Copyright 1985-2026"
 #define COPYRIGHT_BANNER_B \
     "         By Stichting Mathematisch Centrum and M. Stephenson."
 /* nomakedefs.copyright_banner_c is generated at runtime */