diff --git a/.tool-versions b/.tool-versions
deleted file mode 100644
index 510eaf42..00000000
--- a/.tool-versions
+++ /dev/null
@@ -1,2 +0,0 @@
-elixir 1.15.7-otp-26
-erlang 26.1.2
diff --git a/lib/grpc/server/interceptors/cors.ex b/lib/grpc/server/interceptors/cors.ex
index d75b4fa9..171e0cde 100644
--- a/lib/grpc/server/interceptors/cors.ex
+++ b/lib/grpc/server/interceptors/cors.ex
@@ -77,8 +77,7 @@ defmodule GRPC.Server.Interceptors.CORS do
 
   @impl true
   def call(req, stream, next, {allow_origin, allow_headers}) do
-    if stream.access_mode != :grpc and
-         Map.get(stream.http_request_headers, "sec-fetch-mode") == "cors" do
+    if stream.access_mode != :grpc do
       headers =
         %{}
         |> add_allowed_origins(req, stream, allow_origin)
diff --git a/test/grpc/server/interceptors/cors_test.exs b/test/grpc/server/interceptors/cors_test.exs
index 7805ab7b..6a5792bf 100644
--- a/test/grpc/server/interceptors/cors_test.exs
+++ b/test/grpc/server/interceptors/cors_test.exs
@@ -271,44 +271,4 @@ defmodule GRPC.Server.Interceptors.CORSTest do
       "Incorrect header when using function"
     )
   end
-
-  test "CORS only on cors sec-fetch-mode" do
-    request = %FakeRequest{}
-
-    stream = %{
-      create_stream()
-      | access_mode: :grpcweb,
-        http_request_headers: Map.put(@default_http_headers, "sec-fetch-mode", "same-origin")
-    }
-
-    {:ok, :ok} =
-      CORSInterceptor.call(
-        request,
-        %{stream | access_mode: :grpcweb},
-        fn _request, _stream -> {:ok, :ok} end,
-        CORSInterceptor.init(allow_origin: "*")
-      )
-
-    refute_received({:setting_headers, _}, "Set CORS header")
-  end
-
-  test "No CORS if missing sec-fetch-mode header" do
-    request = %FakeRequest{}
-
-    stream = %{
-      create_stream()
-      | access_mode: :grpcweb,
-        http_request_headers: Map.delete(@default_http_headers, "sec-fetch-mode")
-    }
-
-    {:ok, :ok} =
-      CORSInterceptor.call(
-        request,
-        %{stream | access_mode: :grpcweb},
-        fn _request, _stream -> {:ok, :ok} end,
-        CORSInterceptor.init(allow_origin: "*")
-      )
-
-    refute_received({:setting_headers, _}, "Set CORS header")
-  end
 end