diff --git a/core/config.mk b/core/config.mk
index 7f9891d5a..11a1d8ddd 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -893,7 +893,7 @@ BUILD_DATETIME_FROM_FILE := $$(cat $(BUILD_DATETIME_FILE))
 # is made which breaks compatibility with the previous platform sepolicy version,
 # not just on every increase in PLATFORM_SDK_VERSION.  The minor version should
 # be reset to 0 on every bump of the PLATFORM_SDK_VERSION.
-sepolicy_major_vers := 27
+sepolicy_major_vers := 28
 sepolicy_minor_vers := 0
 
 ifneq ($(sepolicy_major_vers), $(PLATFORM_SDK_VERSION))
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index d8f5c8768..8ddc324ef 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -89,7 +89,7 @@ MAX_PLATFORM_VERSION :=
 # generate the range of allowed SDK versions, so it must have an entry for every
 # unreleased API level targetable by this branch, not just those that are valid
 # lunch targets for this branch.
-PLATFORM_VERSION.PPR1 := P
+PLATFORM_VERSION.PPR1 := 9
 PLATFORM_VERSION.QPR1 := Q
 
 # These are the current development codenames, if the build is not a final
@@ -123,7 +123,7 @@ ifndef PLATFORM_SDK_VERSION
   # When you increment the PLATFORM_SDK_VERSION please ensure you also
   # clear out the following text file of all older PLATFORM_VERSION's:
   # cts/tests/tests/os/assets/platform_versions.txt
-  PLATFORM_SDK_VERSION := 27
+  PLATFORM_SDK_VERSION := 28
 endif
 .KATI_READONLY := PLATFORM_SDK_VERSION