diff --git a/WORKSPACE.bazel b/WORKSPACE.bazel
index 425cadcec..6983441b3 100644
--- a/WORKSPACE.bazel
+++ b/WORKSPACE.bazel
@@ -35,9 +35,9 @@ switched_rules_by_language(name = "com_google_googleapis_imports", grpc = True)
 #
 http_archive(
   name = "com_google_protobuf",
-  sha256 = "8242327e5df8c80ba49e4165250b8f79a76bd11765facefaaecfca7747dc8da2",
-  urls = ["https://github.com/protocolbuffers/protobuf/archive/v3.21.5.zip"],
-  strip_prefix = "protobuf-3.21.5",
+  sha256 = "3d76fb2f9401124a29879b3673464767427ad17c9ef57b15c0d7962824e83ac7",
+  urls = ["https://github.com/protocolbuffers/protobuf/archive/v3.21.8.zip"],
+  strip_prefix = "protobuf-3.21.8",
 )
 load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
 protobuf_deps()