diff --git a/apps/emqx/src/emqx.app.src b/apps/emqx/src/emqx.app.src
index cff8cf35b..d9598ee1b 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, "5.1.4"},
+    {vsn, "5.1.5"},
     {modules, []},
     {registered, []},
     {applications, [
diff --git a/apps/emqx/src/emqx_router_sup.erl b/apps/emqx/src/emqx_router_sup.erl
index d0e5ea05a..0fa48d9d2 100644
--- a/apps/emqx/src/emqx_router_sup.erl
+++ b/apps/emqx/src/emqx_router_sup.erl
@@ -41,4 +41,9 @@ init([]) ->
         hash,
         {emqx_router, start_link, []}
     ]),
-    {ok, {{one_for_all, 0, 1}, [Helper, RouterPool]}}.
+    SupFlags = #{
+        strategy => one_for_one,
+        intensity => 10,
+        period => 100
+    },
+    {ok, {SupFlags, [Helper, RouterPool]}}.
diff --git a/changes/ce/fix-11388.en.md b/changes/ce/fix-11388.en.md
new file mode 100644
index 000000000..835155585
--- /dev/null
+++ b/changes/ce/fix-11388.en.md
@@ -0,0 +1,6 @@
+Increase `emqx_router_sup` restart intensity.
+
+The goal is to tolerate occasional crashes that can happen under relatively normal conditions
+and don't seem critical to shutdown the whole app (emqx).
+For example, mria write/delete call delegated from a replicant to a core node by `emqx_router_helper` may fail,
+if the core node is being stopped / restarted / not ready.