diff --git a/CHANGELOG.md b/CHANGELOG.md
index ae0f49d..09c3dbf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## Development Build: equuleus-rc1+dev51
+- Support scheduled uplink check
+- updating ci_lab to use new versioning system
+- See <https://github.com/nasa/ci_lab/pull/162> and <https://github.com/nasa/ci_lab/pull/171>
+
 ## Development Build: v2.5.0-rc4_dev81
 - define msgids via topicids
 - See <https://github.com/nasa/ci_lab/pull/165>
diff --git a/fsw/src/ci_lab_version.h b/fsw/src/ci_lab_version.h
index 6fb3e30..7620735 100644
--- a/fsw/src/ci_lab_version.h
+++ b/fsw/src/ci_lab_version.h
@@ -25,7 +25,7 @@
 
 /* Development Build Macro Definitions */
 
-#define CI_LAB_BUILD_NUMBER     81 /*!< Development Build: Number of commits since baseline */
+#define CI_LAB_BUILD_NUMBER     51 /*!< Development Build: Number of commits since baseline */
 #define CI_LAB_BUILD_BASELINE   "equuleus-rc1" /*!< Development Build: git tag that is the base for the current development */
 #define CI_LAB_BUILD_DEV_CYCLE 	"equuleus-rc2" /**< @brief Development: Release name for current development cycle */
 #define CI_LAB_BUILD_CODENAME   "Equuleus" /**< @brief: Development: Code name for the current build */