diff --git a/maintainer/feature_maturity_level.yaml b/maintainer/feature_maturity_level.yaml
index bafe1fc2..6fbb06e9 100644
--- a/maintainer/feature_maturity_level.yaml
+++ b/maintainer/feature_maturity_level.yaml
@@ -81,7 +81,7 @@ plugins:
     experimental_since: 0.4.0
   - name: sentinel
     status: experimental
-    experimental_since: 0.4.0
+    experimental_since: 0.5.0
   - name: tls_inspector
     status: experimental
     experimental_since: 0.4.0
diff --git a/plugins/plugins/sentinel/filter.go b/plugins/plugins/sentinel/filter.go
index 106acabf..7226ae57 100644
--- a/plugins/plugins/sentinel/filter.go
+++ b/plugins/plugins/sentinel/filter.go
@@ -120,14 +120,9 @@ func (f *filter) OnLog(reqHeaders api.RequestHeaderMap, reqTrailers api.RequestT
 	// the statistics of metrics of Flow and HotSpot rules are completed in request phase (DecodeHeaders).
 	// However, considering the boundary problems such as memory leakage caused by client interrupting the request,
 	// we do Exit in OnLog after response phase.
-	// See site/content/en/docs/developer-guide/get_involved.md#filter.
+	// See https://github.com/mosn/htnn/blob/main/site/content/en/docs/developer-guide/get_involved.md#filter
 	defer e.Exit()
 
-	if respHeaders == nil {
-		api.LogError("response headers is nil")
-		return
-	}
-
 	gotSC, ok := respHeaders.Status()
 	if !ok {
 		api.LogWarn("failed to get response status code")