diff --git a/CHANGELOG.md b/CHANGELOG.md
index b26b7b1..b9f8070 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,16 @@
 # Changelog
 
+# 5.1.0
+
+### Added
+
+- **Previous session time**: functionality to get the last session time
+
+### Fixed
+
+- **Playtime Metrics**: Fixed annotations for session time and total session time
+- **MacOS**: GPU model detection
+
 ## 5.0.0
 
 ### Added
diff --git a/source/gameanalytics/GACommon.h b/source/gameanalytics/GACommon.h
index 37f533c..c6890c3 100644
--- a/source/gameanalytics/GACommon.h
+++ b/source/gameanalytics/GACommon.h
@@ -85,7 +85,7 @@ namespace gameanalytics
         class GAState;
     }
 
-    constexpr const char* GA_VERSION_STR = "cpp 5.0.0";
+    constexpr const char* GA_VERSION_STR = "cpp 5.1.0";
 
     constexpr int MAX_CUSTOM_FIELDS_COUNT				 = 50;
     constexpr int MAX_CUSTOM_FIELDS_KEY_LENGTH			 = 64;