diff --git a/.gitmodules b/.gitmodules
index 12351544..15d30bd8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,7 +1,7 @@
 [submodule "deps/zlib"]
 	path = deps/zlib
 	url = https://github.com/madler/zlib.git
-	branch = master
+	branch = develop
 [submodule "deps/json11"]
 	path = deps/json11
 	url = https://github.com/dropbox/json11.git
diff --git a/deps/zlib b/deps/zlib
index 50893291..70a8763b 160000
--- a/deps/zlib
+++ b/deps/zlib
@@ -1 +1 @@
-Subproject commit 50893291621658f355bc5b4d450a8d06a563053d
+Subproject commit 70a8763b7187f2536ce7fe4d399ce9a79c9faf7c