diff --git a/core/AMBuilder b/core/AMBuilder
index d9f62d83..b8f466be 100644
--- a/core/AMBuilder
+++ b/core/AMBuilder
@@ -52,17 +52,14 @@ for sdk_name in SM.sdks:
   compiler = binary.compiler
 
   if sdk.name == 'csgo':
-    # Protobuf 2.3 headers have some signed/unsigned compares. I believe that it's fixed in later versions, but Valve.
-    if compiler.cxx.behavior == 'gcc':
-      compiler.cflags += ['-Wno-sign-compare']
     compiler.cxxincludes += [
-      os.path.join(sdk.path, 'common', 'protobuf-2.3.0', 'src'),
+      os.path.join(sdk.path, 'common', 'protobuf-2.5.0', 'src'),
       os.path.join(sdk.path, 'public', 'engine', 'protobuf'),
       os.path.join(sdk.path, 'public', 'game', 'shared', 'csgo', 'protobuf')
     ]
   elif sdk.name == 'dota':
     compiler.cxxincludes += [
-      os.path.join(sdk.path, 'common', 'protobuf-2.4.1', 'src'),
+      os.path.join(sdk.path, 'common', 'protobuf-2.5.0', 'src'),
       os.path.join(sdk.path, 'public', 'engine', 'protobuf'),
       os.path.join(sdk.path, 'public', 'game', 'shared', 'protobuf'),
       os.path.join(sdk.path, 'public', 'game', 'shared', 'dota', 'protobuf')
@@ -109,6 +106,7 @@ for sdk_name in SM.sdks:
     binary.sources += [
       os.path.join(sdk.path, 'public', 'engine', 'protobuf', 'networkbasetypes.pb.cc'),
       os.path.join(sdk.path, 'public', 'engine', 'protobuf', 'netmessages.pb.cc'),
+      os.path.join(sdk.path, 'public', 'engine', 'protobuf', 'network_connection.pb.cc'),
       os.path.join(sdk.path, 'public', 'game', 'shared', 'protobuf', 'ai_activity.pb.cc'),
       os.path.join(sdk.path, 'public', 'game', 'shared', 'protobuf', 'usermessages.pb.cc'),
       os.path.join(sdk.path, 'public', 'game', 'shared', 'dota', 'protobuf', 'dota_commonmessages.pb.cc'),