diff --git a/.gitmodules b/.gitmodules
index ffccf036..ebe6e98a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,7 @@
 [submodule "deps/zlib"]
 	path = deps/zlib
 	url = https://github.com/madler/zlib
+	branch = master
 [submodule "deps/fmt"]
 	path = deps/fmt
 	url = https://github.com/fmtlib/fmt
diff --git a/deps/zlib b/deps/zlib
index 79a0e447..09155eaa 160000
--- a/deps/zlib
+++ b/deps/zlib
@@ -1 +1 @@
-Subproject commit 79a0e447a0dfa32979420cb21cfb96d684b2c9d5
+Subproject commit 09155eaa2f9270dc4ed1fa13e2b4b2613e6e4851