diff --git a/README.md b/README.md
index 079a5fb4..992fd2b0 100644
--- a/README.md
+++ b/README.md
@@ -227,7 +227,7 @@ You can sponsor this project via these ways.
 
 Your sponsorship will help us develop pkpy continuously.
 
-## Premium Supporter
+## Premium supporter
 
 Special thanks to our premium supporter, Tesselmax, for sponsoring the development of pocketpy.
 
diff --git a/docs/index.md b/docs/index.md
index 4cd2e0fd..732d0dcc 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -62,7 +62,7 @@ You can sponsor this project via these ways.
 
 Your sponsorship will help us develop pkpy continuously.
 
-## Premium Supporter
+## Premium supporter
 
 Special thanks to our premium supporter, Tesselmax, for sponsoring the development of pocketpy.