diff --git a/linters/plugin.yaml b/linters/plugin.yaml
index bc0e4e8c6..a4ad69cf9 100644
--- a/linters/plugin.yaml
+++ b/linters/plugin.yaml
@@ -601,8 +601,10 @@ lint:
 
     - name: textproto
       extensions:
+        - pbtxt
         - textpb
         - textproto
+        - txtpb
       comments:
         - hash