diff --git a/README.md b/README.md
index 1e299d20b..1fd66ede8 100644
--- a/README.md
+++ b/README.md
@@ -1954,6 +1954,9 @@ General security recommendations:
 - All the VictoriaMetrics components must run in protected private networks without direct access from untrusted networks such as Internet. The exception is [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html).
 - All the requests from untrusted networks to VictoriaMetrics components must go through auth proxy such as vmauth or vmgateway. The proxy must be set up with proper authentication and authorization.
 - Prefer using lists of allowed API endpoints, while disallowing access to other endpoints when configuring auth proxy in front of VictoriaMetrics components.
+- Set reasonable [`Strict-Transport-Security`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) header value to all the components to mitigate [MitM attacks](https://en.wikipedia.org/wiki/Man-in-the-middle_attack), for example: `max-age=31536000; includeSubDomains`. See `-http.header.hsts` flag.
+- Set reasonable [`Content-Security-Policy`](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) header value to mitigate [XSS attacks](https://en.wikipedia.org/wiki/Cross-site_scripting). See `-http.header.csp` flag.
+- Set reasonable [`X-Frame-Options`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options) header value to mitigate [clickjacking attacks](https://en.wikipedia.org/wiki/Clickjacking), for example `DENY`. See `-http.header.frameOptions` flag.
 
 VictoriaMetrics provides the following security-related command-line flags:
 
diff --git a/lib/httpserver/httpserver.go b/lib/httpserver/httpserver.go
index c954b8706..cc2d17652 100644
--- a/lib/httpserver/httpserver.go
+++ b/lib/httpserver/httpserver.go
@@ -53,9 +53,9 @@ var (
 	idleConnTimeout             = flag.Duration("http.idleConnTimeout", time.Minute, "Timeout for incoming idle http connections")
 	connTimeout                 = flag.Duration("http.connTimeout", 2*time.Minute, `Incoming http connections are closed after the configured timeout. This may help to spread the incoming load among a cluster of services behind a load balancer. Please note that the real timeout may be bigger by up to 10% as a protection against the thundering herd problem`)
 
-	headerHSTS         = flag.String("http.header.hsts", "", "Value for 'Strict-Transport-Security' header")
+	headerHSTS         = flag.String("http.header.hsts", "", "Value for 'Strict-Transport-Security' header, recommended: `max-age=31536000; includeSubDomains`")
 	headerFrameOptions = flag.String("http.header.frameOptions", "", "Value for 'X-Frame-Options' header")
-	headerCSP          = flag.String("http.header.csp", "", "Value for 'Content-Security-Policy' header")
+	headerCSP          = flag.String("http.header.csp", "", "Value for 'Content-Security-Policy' header, recommended: `default-src 'self'`")
 )
 
 var (