diff --git a/bazel/grpc_deps.bzl b/bazel/grpc_deps.bzl
index 1f64e9fe5b4..5121eb1e328 100644
--- a/bazel/grpc_deps.bzl
+++ b/bazel/grpc_deps.bzl
@@ -247,11 +247,11 @@ def grpc_deps():
         http_archive(
             name = "zlib",
             build_file = "@com_github_grpc_grpc//third_party:zlib.BUILD",
-            sha256 = "90f43a9c998740e8a0db24b0af0147033db2aaaa99423129abbd76640757cac9",
-            strip_prefix = "zlib-04f42ceca40f73e2978b50e93806c2a18c1281fc",
+            sha256 = "18337cdb32562003c39d9f7322b9a166ad4abfb2b909566428e11f96d2385586",
+            strip_prefix = "zlib-09155eaa2f9270dc4ed1fa13e2b4b2613e6e4851",
             urls = [
-                "https://storage.googleapis.com/grpc-bazel-mirror/github.com/madler/zlib/archive/04f42ceca40f73e2978b50e93806c2a18c1281fc.tar.gz",
-                "https://github.com/madler/zlib/archive/04f42ceca40f73e2978b50e93806c2a18c1281fc.tar.gz",
+                "https://storage.googleapis.com/grpc-bazel-mirror/github.com/madler/zlib/archive/09155eaa2f9270dc4ed1fa13e2b4b2613e6e4851.tar.gz",
+                "https://github.com/madler/zlib/archive/09155eaa2f9270dc4ed1fa13e2b4b2613e6e4851.tar.gz",
             ],
         )
 
diff --git a/third_party/zlib b/third_party/zlib
index 04f42ceca40..09155eaa2f9 160000
--- a/third_party/zlib
+++ b/third_party/zlib
@@ -1 +1 @@
-Subproject commit 04f42ceca40f73e2978b50e93806c2a18c1281fc
+Subproject commit 09155eaa2f9270dc4ed1fa13e2b4b2613e6e4851
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index 38b1cb4e201..ffe5b6a9bd8 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -39,7 +39,7 @@ third_party/protobuf 6b5d8db01fe47478e8d400f550e797e6230d464e
 third_party/protoc-gen-validate fab737efbb4b4d03e7c771393708f75594b121e4
 third_party/re2 0c5616df9c0aaa44c9440d87422012423d91c7d1
 third_party/xds e9ce68804cb4e64cab5a52e3c8baf840d4ff87b7
-third_party/zlib 04f42ceca40f73e2978b50e93806c2a18c1281fc
+third_party/zlib 09155eaa2f9270dc4ed1fa13e2b4b2613e6e4851
 EOF
 
 diff -u "$submodules" "$want_submodules"