diff --git a/Pistols/9mm_AP-9_Pistol-derwood/README.md b/Pistols/9mm_AP-9_Pistol-derwood/README.md
index 2852cd8..64bab7a 100644
--- a/Pistols/9mm_AP-9_Pistol-derwood/README.md
+++ b/Pistols/9mm_AP-9_Pistol-derwood/README.md
@@ -40,3 +40,6 @@ FINALLY! This is the AP-9 9mm Pistol by Derwood. The AP-9 is inspired by the Shu
 
 #### Instructions
 * Video Instructions by Derwood: https://www.youtube.com/watch?v=ACgnVmFaw1M
+
+#### Changelog
+* v1.1 has upgrade to a steel tip bolt housing and new upper for generic glock barrel.
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