diff --git a/configure/CONFIG_MODULE b/configure/CONFIG_MODULE
index 6d09c89c60c8ce0a4f3ac52921dce0491908cf89..e75911dbe32ead135457f4a66aac5b93be9307de 100644
--- a/configure/CONFIG_MODULE
+++ b/configure/CONFIG_MODULE
@@ -4,7 +4,7 @@ EPICS_MODULE_TAG:=tags/v3.16.0
 #
 E3_MODULE_VERSION:=3.16.0
 #
-ASYN_DEP_VERSION=4.39.0
+ASYN_DEP_VERSION=4.37.0
 #
 LOKI_DEP_VERSION=1.0.0
 #