diff --git a/src/deps/deps.json b/src/deps/deps.json
index 2cb51716c..f9c96c334 100644
--- a/src/deps/deps.json
+++ b/src/deps/deps.json
@@ -231,9 +231,9 @@
     },
     {
       "id": "zlib",
-      "name": "zlib v1.3",
+      "name": "zlib v1.3.1",
       "url": "https://github.com/madler/zlib.git",
-      "commit": "09155eaa2f9270dc4ed1fa13e2b4b2613e6e4851"
+      "commit": "51b7f2abdade71cd9bb0e7a373ef2610ec6f9daf"
     },
     {
       "id": "lua-resty-redis-connector",