diff --git a/tools/run_on_app.py b/tools/run_on_app.py
index 0a41128..2f4dcbc 100755
--- a/tools/run_on_app.py
+++ b/tools/run_on_app.py
@@ -318,8 +318,10 @@
     if 'allow-type-errors' in values:
       extra_args.append('-Dcom.android.tools.r8.allowTypeErrors=1')
     if 'proto-shrinking' in values:
+      extra_args.append('-Dcom.android.tools.r8.fieldBitAccessAnalysis=1')
       extra_args.append('-Dcom.android.tools.r8.generatedExtensionRegistryShrinking=1')
       extra_args.append('-Dcom.android.tools.r8.generatedMessageLiteShrinking=1')
+      extra_args.append('-Dcom.android.tools.r8.stringSwitchConversion=1')
 
   if not options.no_libraries and 'libraries' in values:
     for lib in values['libraries']: