diff --git a/script/build.ts b/script/build.ts
index bc570272..f5455863 100644
--- a/script/build.ts
+++ b/script/build.ts
@@ -7,7 +7,7 @@ const root = dirname(__dirname)
 function main() {
   const zmq_rev =
     // eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing, @typescript-eslint/strict-boolean-expressions
-    process.env.ZMQ_VERSION || "v4.3.5"
+    process.env.ZMQ_VERSION || "622fc6dde99ee172ebaa9c8628d85a7a1995a21d"
   const src_url = `https://github.com/zeromq/libzmq/archive/${zmq_rev}.tar.gz`
 
   const libzmq_build_prefix = `${root}/build/libzmq-staging`