diff --git a/bazel/grpc_deps.bzl b/bazel/grpc_deps.bzl
index 58693ebf230..dceeace99b6 100644
--- a/bazel/grpc_deps.bzl
+++ b/bazel/grpc_deps.bzl
@@ -217,11 +217,11 @@ def grpc_deps():
         http_archive(
             name = "zlib",
             build_file = "@com_github_grpc_grpc//third_party:zlib.BUILD",
-            sha256 = "ef47b0fbe646d69a2fc5ba012cb278de8e8946a8e9649f83a807cc05559f0eff",
-            strip_prefix = "zlib-21767c654d31d2dccdde4330529775c6c5fd5389",
+            sha256 = "90f43a9c998740e8a0db24b0af0147033db2aaaa99423129abbd76640757cac9",
+            strip_prefix = "zlib-04f42ceca40f73e2978b50e93806c2a18c1281fc",
             urls = [
-                "https://storage.googleapis.com/grpc-bazel-mirror/github.com/madler/zlib/archive/21767c654d31d2dccdde4330529775c6c5fd5389.tar.gz",
-                "https://github.com/madler/zlib/archive/21767c654d31d2dccdde4330529775c6c5fd5389.tar.gz",
+                "https://storage.googleapis.com/grpc-bazel-mirror/github.com/madler/zlib/archive/04f42ceca40f73e2978b50e93806c2a18c1281fc.tar.gz",
+                "https://github.com/madler/zlib/archive/04f42ceca40f73e2978b50e93806c2a18c1281fc.tar.gz",
             ],
         )
 
diff --git a/third_party/zlib b/third_party/zlib
index 21767c654d3..04f42ceca40 160000
--- a/third_party/zlib
+++ b/third_party/zlib
@@ -1 +1 @@
-Subproject commit 21767c654d31d2dccdde4330529775c6c5fd5389
+Subproject commit 04f42ceca40f73e2978b50e93806c2a18c1281fc
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index b4fd2b3c053..a535a91bc8f 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -39,7 +39,7 @@ third_party/opentelemetry 60fa8754d890b5c55949a8c68dcfd7ab5c2395df
 third_party/protobuf 24487dd1045c7f3d64a21f38a3f0c06cc4cf2edb
 third_party/re2 8e08f47b11b413302749c0d8b17a1c94777495d5
 third_party/xds cb28da3451f158a947dfc45090fe92b07b243bc1
-third_party/zlib 21767c654d31d2dccdde4330529775c6c5fd5389
+third_party/zlib 04f42ceca40f73e2978b50e93806c2a18c1281fc
 EOF
 
 diff -u "$submodules" "$want_submodules"