diff --git a/ext/asio b/ext/asio
new file mode 160000
index 0000000000000000000000000000000000000000..f0a1e1c7c0387ad16358c81eb52528f190df625c
--- /dev/null
+++ b/ext/asio
@@ -0,0 +1 @@
+Subproject commit f0a1e1c7c0387ad16358c81eb52528f190df625c