diff --git a/apps/emqx/rebar.config b/apps/emqx/rebar.config
index aea67376c..ef91981c5 100644
--- a/apps/emqx/rebar.config
+++ b/apps/emqx/rebar.config
@@ -30,7 +30,7 @@
     {esockd, {git, "https://github.com/emqx/esockd", {tag, "5.9.1"}}},
     {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.12.3"}}},
     {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.8.1"}}},
-    {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.26.4"}}},
+    {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.26.6"}}},
     {pbkdf2, {git, "https://github.com/emqx/erlang-pbkdf2.git", {tag, "2.0.4"}}},
     {recon, {git, "https://github.com/ferd/recon", {tag, "2.5.1"}}},
     {snabbkaffe, {git, "https://github.com/kafka4beam/snabbkaffe.git", {tag, "0.18.0"}}}
diff --git a/apps/emqx_prometheus/rebar.config b/apps/emqx_prometheus/rebar.config
index 42212df9f..b05091515 100644
--- a/apps/emqx_prometheus/rebar.config
+++ b/apps/emqx_prometheus/rebar.config
@@ -4,7 +4,7 @@
  [ {emqx, {path, "../emqx"}},
    %% FIXME: tag this as v3.1.3
    {prometheus, {git, "https://github.com/deadtrickster/prometheus.erl", {tag, "v4.8.1"}}},
-   {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.26.4"}}}
+   {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.26.6"}}}
  ]}.
 
 {edoc_opts, [{preprocess, true}]}.
diff --git a/build b/build
index 8fe1e1fd7..f231b3fee 100755
--- a/build
+++ b/build
@@ -70,6 +70,7 @@ make_doc() {
     local libs_dir1 libs_dir2
     libs_dir1="$("$FIND" "_build/default/lib/" -maxdepth 2 -name ebin -type d)"
     libs_dir2="$("$FIND" "_build/$PROFILE/lib/" -maxdepth 2 -name ebin -type d)"
+    libs_dir3="$("$FIND" "_build/$PROFILE/checkouts/" -maxdepth 2 -name ebin -type d)"
     case $PROFILE in
         emqx-enterprise)
             SCHEMA_MODULE='emqx_enterprise_conf_schema'
@@ -79,7 +80,7 @@ make_doc() {
             ;;
     esac
     # shellcheck disable=SC2086
-    erl -noshell -pa $libs_dir1 $libs_dir2 -eval \
+    erl -noshell -pa $libs_dir1 $libs_dir2 $libs_dir3 -eval \
         "Dir = filename:join(['_build', '${PROFILE}', lib, emqx_dashboard, priv, www, static]), \
          ok = emqx_conf:dump_schema(Dir, $SCHEMA_MODULE), \
          halt(0)."
diff --git a/mix.exs b/mix.exs
index d7d05e979..d87a4366b 100644
--- a/mix.exs
+++ b/mix.exs
@@ -68,7 +68,7 @@ defmodule EMQXUmbrella.MixProject do
       # in conflict by emqtt and hocon
       {:getopt, "1.0.2", override: true},
       {:snabbkaffe, github: "kafka4beam/snabbkaffe", tag: "0.18.0", override: true},
-      {:hocon, github: "emqx/hocon", tag: "0.26.4", override: true},
+      {:hocon, github: "emqx/hocon", tag: "0.26.6", override: true},
       {:emqx_http_lib, github: "emqx/emqx_http_lib", tag: "0.4.1", override: true},
       {:esasl, github: "emqx/esasl", tag: "0.2.0"},
       {:jose, github: "potatosalad/erlang-jose", tag: "1.11.2"},
diff --git a/rebar.config b/rebar.config
index 2e3544309..e62810ece 100644
--- a/rebar.config
+++ b/rebar.config
@@ -66,7 +66,7 @@
     , {system_monitor, {git, "https://github.com/ieQu1/system_monitor", {tag, "3.0.2"}}}
     , {getopt, "1.0.2"}
     , {snabbkaffe, {git, "https://github.com/kafka4beam/snabbkaffe.git", {tag, "0.18.0"}}}
-    , {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.26.4"}}}
+    , {hocon, {git, "https://github.com/emqx/hocon.git", {tag, "0.26.6"}}}
     , {emqx_http_lib, {git, "https://github.com/emqx/emqx_http_lib.git", {tag, "0.4.1"}}}
     , {esasl, {git, "https://github.com/emqx/esasl", {tag, "0.2.0"}}}
     , {jose, {git, "https://github.com/potatosalad/erlang-jose", {tag, "1.11.2"}}}