diff --git a/apps/emqx_coap/rebar.config b/apps/emqx_coap/rebar.config
index 0f8759b8a..e1da2c197 100644
--- a/apps/emqx_coap/rebar.config
+++ b/apps/emqx_coap/rebar.config
@@ -1,4 +1,4 @@
 {deps,
  [
-  {gen_coap, {git, "https://github.com/emqx/gen_coap", {tag, "v0.3.2"}}}
+  {gen_coap, {git, "https://github.com/emqx/gen_coap", {tag, "v0.4.2"}}}
  ]}.