diff --git a/interceptors/SecurityHeaders.cfc b/interceptors/SecurityHeaders.cfc
index 978031a..0ffecf2 100644
--- a/interceptors/SecurityHeaders.cfc
+++ b/interceptors/SecurityHeaders.cfc
@@ -250,12 +250,12 @@ component extends="coldbox.system.Interceptor" {
 		}
 
 		if ( variables.settings.securityHeaders.hsts.enabled ) {
-			var headerValue = "max-age: #variables.settings.securityHeaders.hsts[ "max-age" ]#;";
+			var headerValue = "max-age=#variables.settings.securityHeaders.hsts[ "max-age" ]#";
 			if ( variables.settings.securityHeaders.hsts.includeSubDomains ) {
-				headerValue &= " includeSubDomains";
+				headerValue &= "; includeSubDomains";
 			}
 			if ( variables.settings.securityHeaders.hsts.preload ) {
-				headerValue &= " preload";
+				headerValue &= "; preload";
 			}
 			event.setHTTPHeader( name: "Strict-Transport-Security", value: headerValue );
 		}