diff --git a/deps/chakrashim/core/Build/NuGet/.pack-version b/deps/chakrashim/core/Build/NuGet/.pack-version
index 227cea21564..bc80560fad6 100644
--- a/deps/chakrashim/core/Build/NuGet/.pack-version
+++ b/deps/chakrashim/core/Build/NuGet/.pack-version
@@ -1 +1 @@
-2.0.0
+1.5.0
diff --git a/deps/chakrashim/core/lib/Common/ChakraCoreVersion.h b/deps/chakrashim/core/lib/Common/ChakraCoreVersion.h
index 4aae511b82a..d48aee04fbc 100644
--- a/deps/chakrashim/core/lib/Common/ChakraCoreVersion.h
+++ b/deps/chakrashim/core/lib/Common/ChakraCoreVersion.h
@@ -15,8 +15,8 @@
 // --------------
 
 // ChakraCore version number definitions (used in ChakraCore binary metadata)
-#define CHAKRA_CORE_MAJOR_VERSION 2
-#define CHAKRA_CORE_MINOR_VERSION 0
+#define CHAKRA_CORE_MAJOR_VERSION 1
+#define CHAKRA_CORE_MINOR_VERSION 5
 #define CHAKRA_CORE_PATCH_VERSION 0
 #define CHAKRA_CORE_VERSION_RELEASE_QFE 0 // Redundant with PATCH_VERSION. Keep this value set to 0.
 
@@ -60,4 +60,4 @@
 // Chakra RELEASE flag
 // Mostly redundant with CHAKRA_CORE_VERSION_RELEASE,
 // but semantically refers to Chakra rather than ChakraCore.
-#define CHAKRA_VERSION_RELEASE 1
+#define CHAKRA_VERSION_RELEASE 0