diff --git a/CHANGELOG.md b/CHANGELOG.md
index a136f13f9..e22b299eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Development Build: v6.0.0-rc4+dev173
+- Update action versions
+- add doc-prebuild dependency
+- Update incorrect function header comment
+- See <https://github.com/nasa/osal/pull/1342>, <https://github.com/nasa/osal/pull/1341>, and <https://github.com/nasa/osal/pull/1321>
+
 ## Development Build: v6.0.0-rc4+dev165
 - Update CI to use Ubuntu 20.04
 - See <https://github.com/nasa/osal/pull/1334>
diff --git a/src/os/inc/osapi-version.h b/src/os/inc/osapi-version.h
index 0e662d0b8..4e55f3112 100644
--- a/src/os/inc/osapi-version.h
+++ b/src/os/inc/osapi-version.h
@@ -34,7 +34,7 @@
 /*
  * Development Build Macro Definitions
  */
-#define OS_BUILD_NUMBER   165
+#define OS_BUILD_NUMBER   173
 #define OS_BUILD_BASELINE "v6.0.0-rc4"
 
 /*