diff --git a/vendor/grpc-haskell b/vendor/grpc-haskell
index 4eaf2541d..3ad934e20 160000
--- a/vendor/grpc-haskell
+++ b/vendor/grpc-haskell
@@ -1 +1 @@
-Subproject commit 4eaf2541d1fd75a4bde768047ed289f74023ea6a
+Subproject commit 3ad934e203e085d3fd5b12a7879c63a4a52d7ec8