diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/StrictTransportSecurity.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/StrictTransportSecurity.java
index c0322d9c7d..d5f230d0fd 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/StrictTransportSecurity.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/StrictTransportSecurity.java
@@ -11,11 +11,12 @@ package akka.http.javadsl.model.headers;
 public abstract class StrictTransportSecurity extends akka.http.scaladsl.model.HttpHeader {
     public abstract long maxAge();
     public abstract boolean includeSubDomains();
+    public abstract boolean preload();
 
     public static StrictTransportSecurity create(long maxAge) {
-        return new akka.http.scaladsl.model.headers.Strict$minusTransport$minusSecurity(maxAge, false);
+        return new akka.http.scaladsl.model.headers.Strict$minusTransport$minusSecurity(maxAge, false, false);
     }
-    public static StrictTransportSecurity create(long maxAge, boolean includeSubDomains) {
-        return new akka.http.scaladsl.model.headers.Strict$minusTransport$minusSecurity(maxAge, includeSubDomains);
+    public static StrictTransportSecurity create(long maxAge, boolean includeSubDomains, boolean preload) {
+        return new akka.http.scaladsl.model.headers.Strict$minusTransport$minusSecurity(maxAge, includeSubDomains, preload);
     }
 }
diff --git a/akka-http-core/src/main/scala/akka/http/impl/model/parser/SimpleHeaders.scala b/akka-http-core/src/main/scala/akka/http/impl/model/parser/SimpleHeaders.scala
index a269c701d1..12151ab0dd 100644
--- a/akka-http-core/src/main/scala/akka/http/impl/model/parser/SimpleHeaders.scala
+++ b/akka-http-core/src/main/scala/akka/http/impl/model/parser/SimpleHeaders.scala
@@ -187,7 +187,7 @@ private[parser] trait SimpleHeaders { this: Parser with CommonRules with CommonA
   def server = rule { products ~ EOI ~> (Server(_)) }
 
   def `strict-transport-security` = rule {
-    ignoreCase("max-age=") ~ `delta-seconds` ~ optional(ws(";") ~ ignoreCase("includesubdomains") ~ push(true)) ~ EOI ~> (`Strict-Transport-Security`(_, _))
+    ignoreCase("max-age=") ~ `delta-seconds` ~ optional(ws(";") ~ ignoreCase("includesubdomains") ~ push(true)) ~ optional(ws(";") ~ ignoreCase("preload") ~ push(true)) ~ EOI ~> (`Strict-Transport-Security`(_, _, _))
   }
 
   // http://tools.ietf.org/html/rfc7230#section-3.3.1
@@ -230,4 +230,4 @@ private[parser] trait SimpleHeaders { this: Parser with CommonRules with CommonA
     (`ip-v4-address` | `ip-v6-address`) ~ EOI ~> (b ⇒ `X-Real-Ip`(RemoteAddress(b)))
   }
 
-}
\ No newline at end of file
+}
diff --git a/akka-http-core/src/main/scala/akka/http/scaladsl/model/headers/headers.scala b/akka-http-core/src/main/scala/akka/http/scaladsl/model/headers/headers.scala
index a5510aefce..5f37e9d7c7 100644
--- a/akka-http-core/src/main/scala/akka/http/scaladsl/model/headers/headers.scala
+++ b/akka-http-core/src/main/scala/akka/http/scaladsl/model/headers/headers.scala
@@ -794,12 +794,13 @@ final case class Server(products: immutable.Seq[ProductVersion]) extends jm.head
 
 // https://tools.ietf.org/html/rfc6797
 object `Strict-Transport-Security` extends ModeledCompanion[`Strict-Transport-Security`] {
-  def apply(maxAge: Long, includeSubDomains: Option[Boolean]) = new `Strict-Transport-Security`(maxAge, includeSubDomains.getOrElse(false))
+  def apply(maxAge: Long, includeSubDomains: Option[Boolean], preload: Option[Boolean]) = new `Strict-Transport-Security`(maxAge, includeSubDomains.getOrElse(false), preload.getOrElse(false))
 }
-final case class `Strict-Transport-Security`(maxAge: Long, includeSubDomains: Boolean = false) extends jm.headers.StrictTransportSecurity with ResponseHeader {
+final case class `Strict-Transport-Security`(maxAge: Long, includeSubDomains: Boolean = false, preload: Boolean = false) extends jm.headers.StrictTransportSecurity with ResponseHeader {
   def renderValue[R <: Rendering](r: R): r.type = {
     r ~~ "max-age=" ~~ maxAge
     if (includeSubDomains) r ~~ "; includeSubDomains"
+    if (preload) r ~~ "; preload"
     r
   }
   protected def companion = `Strict-Transport-Security`