diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3249c762..9298fd41 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 Changelog of MMU2S Firmware
 =============================
+# v4.0.1 RMM
+* Pulled Printer Code upstream to 3.10.1
+* Minimal BLTouch refinements for MK3S printers
+
 # v3.3.0 RMM
 * Pulled Printer Code upstream to 3.10.0
 * Implemented BLTouch support for MK3S and created and added extruder hardware to support this.
diff --git a/platformio.ini b/platformio.ini
index 5ee671b1..53464250 100755
--- a/platformio.ini
+++ b/platformio.ini
@@ -1,7 +1,7 @@
 [common_env_data]
 build_flags =
-    -D BN=375
-    -D VERSION=3.3.0
+    -D BN=376
+    -D VERSION=4.0.1
 
 [env:MMU2S]
 platform = atmelavr
diff --git a/src/config.h b/src/config.h
index 107ce2e8..6c991683 100644
--- a/src/config.h
+++ b/src/config.h
@@ -2,8 +2,8 @@
 
 #include "config_tzb.h"
 
-#define FW_VERSION  330 // example: 103 means version 1.0.3
-#define FW_BUILDNR  375 // number of commits in 'master'
+#define FW_VERSION  401 // example: 103 means version 1.0.3
+#define FW_BUILDNR  376 // number of commits in 'master'
 
 #define WAKE_TIMER            300000        // 5m