diff --git a/CHANGELOG.md b/CHANGELOG.md
index 213a8c974..fc3bf054e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## Development Build: equuleus-rc1+dev73
+- High-res timed stream ops
+- Moves OS_strnlen to public API and adds static analysis comments
+- See <https://github.com/nasa/osal/pull/1456> and <https://github.com/nasa/osal/pull/1465>
+
 ## Development Build: equuleus-rc1+dev66
 - Adds node20 compatible github actions
 - See <https://github.com/nasa/osal/pull/1460>
diff --git a/src/os/inc/osapi-version.h b/src/os/inc/osapi-version.h
index 31178cbba..2987b3a26 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     66
+#define OS_BUILD_NUMBER     73
 #define OS_BUILD_BASELINE   "equuleus-rc1"
 #define OS_BUILD_DEV_CYCLE  "equuleus-rc2" /**< @brief Development: Release name for current development cycle */
 #define OS_BUILD_CODENAME   "Equuleus" /**< @brief: Development: Code name for the current build */