diff --git a/rebar.config.erl b/rebar.config.erl
index f818b4f84..4888fafe0 100644
--- a/rebar.config.erl
+++ b/rebar.config.erl
@@ -110,7 +110,7 @@ project_app_dirs() ->
 
 plugins(HasElixir) ->
     [ {relup_helper,{git,"https://github.com/emqx/relup_helper", {tag, "2.0.0"}}}
-    , {er_coap_client, {git, "https://github.com/emqx/er_coap_client", {tag, "v1.0.3"}}}
+    , {er_coap_client, {git, "https://github.com/emqx/er_coap_client", {tag, "v1.0.4"}}}
       %% emqx main project does not require port-compiler
       %% pin at root level for deterministic
     , {pc, {git, "https://github.com/emqx/port_compiler.git", {tag, "v1.11.1"}}}