diff --git a/sdk/build_tools_source.prop_template b/sdk/build_tools_source.prop_template
index b84ae2c77..2ea175b77 100644
--- a/sdk/build_tools_source.prop_template
+++ b/sdk/build_tools_source.prop_template
@@ -1,3 +1,3 @@
 Pkg.UserSrc=false
 #Pkg.Revision=${PLATFORM_SDK_VERSION}.0.0
-Pkg.Revision=31.0.0 rc3
+Pkg.Revision=31.0.0 rc4
diff --git a/sdk/platform_source.prop_template b/sdk/platform_source.prop_template
index 9dc99a0a1..ff513ff0c 100644
--- a/sdk/platform_source.prop_template
+++ b/sdk/platform_source.prop_template
@@ -2,7 +2,7 @@ Pkg.Desc=Android SDK Platform ${PLATFORM_VERSION}
 Pkg.UserSrc=false
 Platform.Version=${PLATFORM_VERSION}
 Platform.CodeName=
-Pkg.Revision=3
+Pkg.Revision=4
 AndroidVersion.ApiLevel=${PLATFORM_SDK_VERSION}
 AndroidVersion.CodeName=${PLATFORM_VERSION_CODENAME}
 Layoutlib.Api=15