diff --git a/README.md b/README.md
index 937320ce8..1a4a7c39c 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,15 @@ The autogenerated OSAL user's guide can be viewed at <https://github.com/nasa/cF
 
 ## Version History
 
+### Development Build: v6.0.0-rc4+dev54
+
+- Revert development version identifier to 99 for revision number
+- Fix cFS-build CodeQL reusable worfklow
+- Implement OS_ModuleGetInfo_Impl for RTEMS
+- Doxygen strip path and expose common config
+- Refactor doxygen and remove mainpage
+- See <https://github.com/nasa/osal/pull/1233> and <https://github.com/nasa/cFS/pull/443>
+
 ### Development Build: v6.0.0-rc4+dev42
 
 - Resolve UT uninitialized variable warnings
diff --git a/src/os/inc/osapi-version.h b/src/os/inc/osapi-version.h
index fa668d038..048cd2eba 100644
--- a/src/os/inc/osapi-version.h
+++ b/src/os/inc/osapi-version.h
@@ -36,7 +36,7 @@
 /*
  * Development Build Macro Definitions
  */
-#define OS_BUILD_NUMBER   42
+#define OS_BUILD_NUMBER   54
 #define OS_BUILD_BASELINE "v6.0.0-rc4"
 
 /*
@@ -44,15 +44,14 @@
  */
 #define OS_MAJOR_VERSION 5 /*!< @brief ONLY APPLY for OFFICIAL releases. Major version number. */
 #define OS_MINOR_VERSION 0 /*!< @brief ONLY APPLY for OFFICIAL releases. Minor version number. */
-#define OS_REVISION      0 /*!< @brief ONLY APPLY for OFFICIAL releases. Revision number.      */
+#define OS_REVISION      99 /*!< * Set to 0 on OFFICIAL releases, and set to 99 on development versions. Revision number.      */
 
 /*!
  * @brief Mission revision.
  *
- * Set to 0 on OFFICIAL releases, and set to 255 (0xFF) on development versions.
- * Values 1-254 are reserved for mission use to denote patches/customizations as needed.
+ * Reserved for mission use to denote patches/customizations as needed.
  */
-#define OS_MISSION_REV 0xFF
+#define OS_MISSION_REV 0
 
 /*
  * Tools to construct version string