diff --git a/apps/emqx_exhook/rebar.config b/apps/emqx_exhook/rebar.config
index 3529b6314..d1cc4d778 100644
--- a/apps/emqx_exhook/rebar.config
+++ b/apps/emqx_exhook/rebar.config
@@ -5,7 +5,7 @@
 ]}.
 
 {deps,
- [{grpc, {git, "https://github.com/emqx/grpc-erl", {tag, "0.6.3"}}}
+ [{grpc, {git, "https://github.com/emqx/grpc-erl", {tag, "0.6.4"}}}
 ]}.
 
 {grpc,
diff --git a/apps/emqx_exproto/rebar.config b/apps/emqx_exproto/rebar.config
index 4ad1aa192..da868de82 100644
--- a/apps/emqx_exproto/rebar.config
+++ b/apps/emqx_exproto/rebar.config
@@ -13,7 +13,7 @@
 ]}.
 
 {deps,
- [{grpc, {git, "https://github.com/emqx/grpc-erl", {tag, "0.6.3"}}}
+ [{grpc, {git, "https://github.com/emqx/grpc-erl", {tag, "0.6.4"}}}
  ]}.
 
 {grpc,