diff --git a/apps/emqx/include/emqx_release.hrl b/apps/emqx/include/emqx_release.hrl
index c7fa97be7..d66c7982a 100644
--- a/apps/emqx/include/emqx_release.hrl
+++ b/apps/emqx/include/emqx_release.hrl
@@ -32,7 +32,7 @@
 %% `apps/emqx/src/bpapi/README.md'
 
 %% Opensource edition
--define(EMQX_RELEASE_CE, "5.1.5-build.3").
+-define(EMQX_RELEASE_CE, "5.1.6").
 
 %% Enterprise edition
 -define(EMQX_RELEASE_EE, "5.2.0-alpha.3").
diff --git a/apps/emqx/src/emqx.app.src b/apps/emqx/src/emqx.app.src
index a80d6482a..7a98579df 100644
--- a/apps/emqx/src/emqx.app.src
+++ b/apps/emqx/src/emqx.app.src
@@ -2,7 +2,7 @@
 {application, emqx, [
     {id, "emqx"},
     {description, "EMQX Core"},
-    {vsn, "5.1.8"},
+    {vsn, "5.1.9"},
     {modules, []},
     {registered, []},
     {applications, [
diff --git a/apps/emqx_authn/src/emqx_authn.app.src b/apps/emqx_authn/src/emqx_authn.app.src
index ae7bea5da..1050bc496 100644
--- a/apps/emqx_authn/src/emqx_authn.app.src
+++ b/apps/emqx_authn/src/emqx_authn.app.src
@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, emqx_authn, [
     {description, "EMQX Authentication"},
-    {vsn, "0.1.25"},
+    {vsn, "0.1.26"},
     {modules, []},
     {registered, [emqx_authn_sup, emqx_authn_registry]},
     {applications, [
diff --git a/apps/emqx_connector/src/emqx_connector.app.src b/apps/emqx_connector/src/emqx_connector.app.src
index 397cd0093..b43122b36 100644
--- a/apps/emqx_connector/src/emqx_connector.app.src
+++ b/apps/emqx_connector/src/emqx_connector.app.src
@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, emqx_connector, [
     {description, "EMQX Data Integration Connectors"},
-    {vsn, "0.1.30"},
+    {vsn, "0.1.31"},
     {registered, []},
     {mod, {emqx_connector_app, []}},
     {applications, [
diff --git a/apps/emqx_ft/src/emqx_ft.app.src b/apps/emqx_ft/src/emqx_ft.app.src
index 8518958e0..f75b1805b 100644
--- a/apps/emqx_ft/src/emqx_ft.app.src
+++ b/apps/emqx_ft/src/emqx_ft.app.src
@@ -1,6 +1,6 @@
 {application, emqx_ft, [
     {description, "EMQX file transfer over MQTT"},
-    {vsn, "0.1.5"},
+    {vsn, "0.1.6"},
     {registered, []},
     {mod, {emqx_ft_app, []}},
     {applications, [
diff --git a/apps/emqx_management/src/emqx_management.app.src b/apps/emqx_management/src/emqx_management.app.src
index e1056ab0c..f16156c35 100644
--- a/apps/emqx_management/src/emqx_management.app.src
+++ b/apps/emqx_management/src/emqx_management.app.src
@@ -2,7 +2,7 @@
 {application, emqx_management, [
     {description, "EMQX Management API and CLI"},
     % strict semver, bump manually!
-    {vsn, "5.0.28"},
+    {vsn, "5.0.29"},
     {modules, []},
     {registered, [emqx_management_sup]},
     {applications, [kernel, stdlib, emqx_plugins, minirest, emqx, emqx_ctl, emqx_bridge_http]},
diff --git a/apps/emqx_modules/src/emqx_modules.app.src b/apps/emqx_modules/src/emqx_modules.app.src
index cd2f6c8b9..cceb51895 100644
--- a/apps/emqx_modules/src/emqx_modules.app.src
+++ b/apps/emqx_modules/src/emqx_modules.app.src
@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, emqx_modules, [
     {description, "EMQX Modules"},
-    {vsn, "5.0.20"},
+    {vsn, "5.0.21"},
     {modules, []},
     {applications, [kernel, stdlib, emqx, emqx_ctl]},
     {mod, {emqx_modules_app, []}},
diff --git a/changes/v5.1.6.en.md b/changes/v5.1.6.en.md
new file mode 100644
index 000000000..1e92f61d1
--- /dev/null
+++ b/changes/v5.1.6.en.md
@@ -0,0 +1,30 @@
+# v5.1.6
+
+## Enhancements
+
+- [#11429](https://github.com/emqx/emqx/pull/11429) Added option to configure detection of legacy protocol in MondoDB connectors and bridges.
+
+- [#11436](https://github.com/emqx/emqx/pull/11436) Added a new API endpoint `DELETE  /banned` to clear all `banned` data.
+
+- [#11438](https://github.com/emqx/emqx/pull/11438) Changed the type of the `mqtt.max_packet_size` from string to byteSize to better represent the valid numeric range.
+  Strings will still be accepted for backwards compatibility.
+
+- [#11446](https://github.com/emqx/emqx/pull/11446) Refactored datetime-related modules and functions to simplify the code.
+
+- [#11396](https://github.com/emqx/emqx/pull/11396) Introduced topic index for the rule engine runtime that significantly improves the performance of EMQX with a non-trivial number of rules consuming messages matching different topic filters.
+
+## Bug Fixes
+
+- [#11424](https://github.com/emqx/emqx/pull/11424) Added a check for the maximum value of the timestamp in the API to ensure it is a valid Unix timestamp.
+
+- [#11445](https://github.com/emqx/emqx/pull/11445) Removed os_mon application monitor support on Windows platforms to prevent VM crashes.
+  Functionality remains on non-Windows platforms.
+
+- [#11454](https://github.com/emqx/emqx/pull/11454) Fixed crashing when debugging/tracing with large payloads(introduce when [#11279](https://github.com/emqx/emqx/pull/11279))
+
+- [#11456](https://github.com/emqx/emqx/pull/11456) Removed validation that enforced non-empty PEM for CA cert file.
+  CA certificate file PEM can now be empty.
+
+- [#11499](https://github.com/emqx/emqx/pull/11499) Upgraded Erlang/OTP to 25.3.2-2.
+
+  Erlang/OTP 25.3.2-2 excludes sensitive data from mnesia_hook log message.
diff --git a/deploy/charts/emqx/Chart.yaml b/deploy/charts/emqx/Chart.yaml
index 1451347e2..f8cd69735 100644
--- a/deploy/charts/emqx/Chart.yaml
+++ b/deploy/charts/emqx/Chart.yaml
@@ -14,8 +14,8 @@ type: application
 
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
-version: 5.1.5-build.3
+version: 5.1.6
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application.
-appVersion: 5.1.5-build.3
+appVersion: 5.1.6
diff --git a/scripts/check_missing_reboot_apps.exs b/scripts/check_missing_reboot_apps.exs
index d9933e099..91d4b39ea 100755
--- a/scripts/check_missing_reboot_apps.exs
+++ b/scripts/check_missing_reboot_apps.exs
@@ -24,10 +24,10 @@ apps =
 
 :xref.start(:xref)
 :xref.set_default(:xref, warnings: false)
-rel_dir = '_build/#{profile}/lib/'
+rel_dir = ~c"_build/#{profile}/lib/"
 :xref.add_release(:xref, rel_dir)
 
-{:ok, calls} = :xref.q(:xref, '(App) (XC | [#{Enum.join(apps, ",")}] || mria:create_table/_)')
+{:ok, calls} = :xref.q(:xref, ~c"(App) (XC | [#{Enum.join(apps, ",")}] || mria:create_table/_)")
 
 emqx_calls =
   calls