diff --git a/external/libzmq b/external/libzmq
index 0ed7a08..64db7d2 160000
--- a/external/libzmq
+++ b/external/libzmq
@@ -1 +1 @@
-Subproject commit 0ed7a08cd946e0832ac4655b7a76c09ac221f63b
+Subproject commit 64db7d28fea695132834f6d2c5949cfea2f22d01