diff --git a/docker/nginx/nginx.conf b/docker/nginx/nginx.conf
index bb027e551..730304f18 100644
--- a/docker/nginx/nginx.conf
+++ b/docker/nginx/nginx.conf
@@ -116,7 +116,7 @@ http {
         add_header X-Frame-Options              DENY;
         add_header X-Content-Type-Options       nosniff;
         # max-age = 31536000s = 1 year
-        add_header Strict-Transport-Security    "max-age=31536000: includeSubDomains" always;
+        add_header Strict-Transport-Security    "max-age=31536000; includeSubDomains" always;
         add_header Front-End-Https              on;
 
         location / {