diff --git a/keydive/constants.py b/keydive/constants.py
index bf6d4c5..d6ff45e 100644
--- a/keydive/constants.py
+++ b/keydive/constants.py
@@ -91,8 +91,7 @@ OEM_CRYPTO_API = {
 # https://developer.android.com/tools/releases/platforms
 CDM_VENDOR_API = {
     'mediaserver': [
-        Vendor(22, 11, '1.0', 'libwvdrmengine.so'),
-        Vendor(23, 11, '1.0', 'libwvdrmengine.so')
+        Vendor(22, 11, '1.0', 'libwvdrmengine.so')
     ],
     'mediadrmserver': [
         Vendor(24, 11, '1.0', 'libwvdrmengine.so')
@@ -132,6 +131,8 @@ CDM_FUNCTION_API = {
     'runningcrc'
 }
 
+KEYBOX_MAX_CLEAR_API = 28
+
 # https://github.com/kaltura/kaltura-device-info-android
 DRM_PLAYER = {
     'package': 'com.kaltura.kalturadeviceinfo',