diff --git a/rules_haskell_tests/MODULE.bazel b/rules_haskell_tests/MODULE.bazel
index f30b4efde..974dc97e1 100644
--- a/rules_haskell_tests/MODULE.bazel
+++ b/rules_haskell_tests/MODULE.bazel
@@ -81,7 +81,7 @@ bazel_dep(
 )
 bazel_dep(
     name = "protobuf",
-    version = "21.7",
+    version = "27.3",
     repo_name = "com_google_protobuf",
 )
 bazel_dep(