diff --git a/res/CREDITS b/res/CREDITS
index 3c81c9745..233a841fa 100644
--- a/res/CREDITS
+++ b/res/CREDITS
@@ -3,7 +3,7 @@
 
                     ~
 
- revision 5.0.1 / serial number 20231113
+  revision 5.1 / serial number 20240216
 
                     ~
 
diff --git a/res/history.md b/res/history.md
index 5c5dbb0a2..ced2d0479 100644
--- a/res/history.md
+++ b/res/history.md
@@ -1,5 +1,22 @@
 # Total Replay changelog
 
+## Revision 5.1 / serial number 20240216
+
+### Games added in v5.1
+
+- Angry Birds
+- Applz
+
+### Enhancements & bug fixes in v5.1
+
+- Upgrade Aztec to retail version
+- Fix crash in Serpentine ([issue 559](https://github.com/a2-4am/4cade/issues/559), thanks audetto)
+- Fix reset issues in Battle Cruiser
+- Fix Mockingboard issues in Berzap, Crime Wave, Mapple
+- Fix compatibility issues in Deathsword ([issue 556](https://github.com/a2-4am/4cade/issues/556), thanks JDW1)
+- Fix compatibility issues in Flapple Bird
+- Fix text display issues during boot
+
 ## Revision 5.0.1 / serial number 20231113
 
 - Fix display issue after quitting DGR games ([PR 549](https://github.com/a2-4am/4cade/pull/549), thanks Tom G.)
diff --git a/src/4cade.version.a b/src/4cade.version.a
index 972ac6439..0f09e3670 100644
--- a/src/4cade.version.a
+++ b/src/4cade.version.a
@@ -1,5 +1,5 @@
 ;license:MIT
-;(c) 2023 by 4am
+;(c) 2023-2024 by 4am
 ;
 
 !ifndef RELEASE {
@@ -11,5 +11,5 @@ LoadingBuild
 } else {
 LoadingVersion
          !byte 12
-         !text "      v5.0.1"
+         !text "        v5.1"
 }
diff --git a/src/index/credits.idx.a b/src/index/credits.idx.a
index 0db22081a..0ee51cba0 100644
--- a/src/index/credits.idx.a
+++ b/src/index/credits.idx.a
@@ -5,4 +5,4 @@
 ;
          !byte 0
          !be24  15462703
-         !le16      450
+         !le16      449
diff --git a/src/index/decrunch.idx.a b/src/index/decrunch.idx.a
index 2a2051b93..b9a0e4b10 100644
--- a/src/index/decrunch.idx.a
+++ b/src/index/decrunch.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15463153
+         !be24  15463152
          !le16      303
diff --git a/src/index/joystick.idx.a b/src/index/joystick.idx.a
index 23ed5b057..fc645d0bb 100644
--- a/src/index/joystick.idx.a
+++ b/src/index/joystick.idx.a
@@ -4,5 +4,5 @@
 ; This file is automatically generated
 ;
          !byte 0
-         !be24  15463456
+         !be24  15463455
          !le16     2370