diff --git a/apps/emqx/rebar.config b/apps/emqx/rebar.config
index ef91981c5..51418dce2 100644
--- a/apps/emqx/rebar.config
+++ b/apps/emqx/rebar.config
@@ -22,7 +22,7 @@
 %% This rebar.config is necessary because the app may be used as a
 %% `git_subdir` dependency in other projects.
 {deps, [
-    {lc, {git, "https://github.com/qzhuyan/lc.git", {tag, "0.1.2"}}},
+    {lc, {git, "https://github.com/emqx/lc.git", {tag, "0.2.1"}}},
     {gproc, {git, "https://github.com/uwiger/gproc", {tag, "0.8.0"}}},
     {typerefl, {git, "https://github.com/ieQu1/typerefl", {tag, "0.8.6"}}},
     {jiffy, {git, "https://github.com/emqx/jiffy", {tag, "1.0.5"}}},
@@ -44,7 +44,7 @@
             {meck, "0.9.2"},
             {proper, "1.4.0"},
             {bbmustache, "1.10.0"},
-            {emqtt, {git, "https://github.com/emqx/emqtt", {tag, "1.4.8"}}}
+            {emqtt, {git, "https://github.com/emqx/emqtt", {tag, "1.5.0"}}}
         ]},
         {extra_src_dirs, [{"test", [recursive]}]}
     ]}
diff --git a/apps/emqx_connector/rebar.config b/apps/emqx_connector/rebar.config
index d904cc636..35b88df31 100644
--- a/apps/emqx_connector/rebar.config
+++ b/apps/emqx_connector/rebar.config
@@ -21,7 +21,7 @@
   %% eredis_cluster's dependency getting resolved earlier.
   %% Here we pin 1.5.2 to avoid surprises in the future.
   {poolboy, {git, "https://github.com/emqx/poolboy.git", {tag, "1.5.2"}}},
-  {emqtt, {git, "https://github.com/emqx/emqtt", {tag, "1.4.8"}}}
+  {emqtt, {git, "https://github.com/emqx/emqtt", {tag, "1.5.0"}}}
 ]}.
 
 {shell, [
diff --git a/apps/emqx_retainer/rebar.config b/apps/emqx_retainer/rebar.config
index 3725849ef..b3f60c616 100644
--- a/apps/emqx_retainer/rebar.config
+++ b/apps/emqx_retainer/rebar.config
@@ -22,6 +22,6 @@
  [{test,
    [{deps,
      [
-      {emqtt, {git, "https://github.com/emqx/emqtt", {tag, "1.4.8"}}}]}
+      {emqtt, {git, "https://github.com/emqx/emqtt", {tag, "1.5.0"}}}]}
    ]}
  ]}.
diff --git a/mix.exs b/mix.exs
index d87a4366b..53abbbef8 100644
--- a/mix.exs
+++ b/mix.exs
@@ -46,7 +46,7 @@ defmodule EMQXUmbrella.MixProject do
     # we need several overrides here because dependencies specify
     # other exact versions, and not ranges.
     [
-      {:lc, github: "qzhuyan/lc", tag: "0.1.2"},
+      {:lc, github: "emqx/lc", tag: "0.2.1"},
       {:redbug, "2.0.7"},
       {:typerefl, github: "ieQu1/typerefl", tag: "0.8.6", override: true},
       {:ehttpc, github: "emqx/ehttpc", tag: "0.1.12"},
@@ -61,7 +61,7 @@ defmodule EMQXUmbrella.MixProject do
       {:ecpool, github: "emqx/ecpool", tag: "0.5.2"},
       {:replayq, "0.3.3", override: true},
       {:pbkdf2, github: "emqx/erlang-pbkdf2", tag: "2.0.4", override: true},
-      {:emqtt, github: "emqx/emqtt", tag: "1.4.8", override: true},
+      {:emqtt, github: "emqx/emqtt", tag: "1.5.0", override: true},
       {:rulesql, github: "emqx/rulesql", tag: "0.1.4"},
       {:observer_cli, "1.7.1"},
       {:system_monitor, github: "ieQu1/system_monitor", tag: "3.0.2"},
diff --git a/rebar.config b/rebar.config
index e62810ece..6beb3a0b9 100644
--- a/rebar.config
+++ b/rebar.config
@@ -44,7 +44,7 @@
 {post_hooks,[]}.
 
 {deps,
-    [ {lc, {git, "https://github.com/qzhuyan/lc.git", {tag, "0.1.2"}}}
+    [ {lc, {git, "https://github.com/emqx/lc.git", {tag, "0.2.1"}}}
     , {redbug, "2.0.7"}
     , {gpb, "4.11.2"} %% gpb only used to build, but not for release, pin it here to avoid fetching a wrong version due to rebar plugins scattered in all the deps
     , {typerefl, {git, "https://github.com/ieQu1/typerefl", {tag, "0.8.6"}}}
@@ -60,7 +60,7 @@
     , {ecpool, {git, "https://github.com/emqx/ecpool", {tag, "0.5.2"}}}
     , {replayq, "0.3.3"}
     , {pbkdf2, {git, "https://github.com/emqx/erlang-pbkdf2.git", {tag, "2.0.4"}}}
-    , {emqtt, {git, "https://github.com/emqx/emqtt", {tag, "1.4.8"}}}
+    , {emqtt, {git, "https://github.com/emqx/emqtt", {tag, "1.5.0"}}}
     , {rulesql, {git, "https://github.com/emqx/rulesql", {tag, "0.1.4"}}}
     , {observer_cli, "1.7.1"} % NOTE: depends on recon 2.5.x
     , {system_monitor, {git, "https://github.com/ieQu1/system_monitor", {tag, "3.0.2"}}}