diff --git a/Dockerfile b/Dockerfile
index 45d1a46..429f5bf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,8 +6,8 @@ ARG CHECKSUM="05dd6d9356d66a74e61035f2a42162f8c754c97cf1ba64e7a801ba158d6c0711"
 ARG OPENSSL_VERSION="3.1.1"
 ARG OPENSSL_CHECKSUM="b3aa61334233b852b63ddb048df181177c2c659eb9d4376008118f9c08d07674"
 
-ARG ZLIB_VERSION="1.2.13"
-ARG ZLIB_CHECKSUM="b3a24de97a8fdbc835b9833169501030b8977031bcb54b3b3ac13740f846ab30"
+ARG ZLIB_VERSION="1.3"
+ARG ZLIB_CHECKSUM="ff0ba4c292013dbc27530b3a81e1f9a813cd39de01ca5e0f8bf355702efa593e"
 
 ADD https://nginx.org/download/nginx-$VERSION.tar.gz /tmp/nginx.tar.gz
 ADD https://www.openssl.org/source/openssl-$OPENSSL_VERSION.tar.gz /tmp/openssl.tar.gz