diff --git a/docs/docs/installation/openbsd_en.md b/docs/docs/installation/openbsd_en.md
index 8b2c459dc..a62421ee4 100644
--- a/docs/docs/installation/openbsd_en.md
+++ b/docs/docs/installation/openbsd_en.md
@@ -167,7 +167,7 @@ http protocol plerup { # Protocol for upstream akkoma server
 	match response header append "Referrer-Policy" value "same-origin"
 	match response header append "Content-Security-Policy" value "default-src 'none'; base-uri 'self'; form-action 'self'; img-src 'self' data: https:; media-src 'self' https:; style-src 'self' 'unsafe-inline'; font-src 'self'; script-src 'self'; connect-src 'self' wss://CHANGEME.tld; upgrade-insecure-requests;" # Modify "CHANGEME.tld" and set your instance's domain here
 	match request header append "Connection" value "upgrade"
-	#match response header append "Strict-Transport-Security" value "max-age=63072000; includeSubDomains" # Uncomment this only after you get HTTPS working.
+	#match response header append "Strict-Transport-Security" value "max-age=63072000; includeSubDomains; preload" # Uncomment this only after you get HTTPS working.
 
 	# If you do not want remote frontends to be able to access your Akkoma backend server, comment these lines
 	match response header append "Access-Control-Allow-Origin" value "*"
diff --git a/lib/pleroma/web/plugs/http_security_plug.ex b/lib/pleroma/web/plugs/http_security_plug.ex
index 393ff58d3..9e76ebd84 100644
--- a/lib/pleroma/web/plugs/http_security_plug.ex
+++ b/lib/pleroma/web/plugs/http_security_plug.ex
@@ -238,7 +238,7 @@ your instance and your users via malicious posts:
     max_age_sts = Config.get([:http_security, :sts_max_age])
 
     merge_resp_headers(conn, [
-      {"strict-transport-security", "max-age=#{max_age_sts}; includeSubDomains"}
+      {"strict-transport-security", "max-age=#{max_age_sts}; includeSubDomains; preload"}
     ])
   end