diff --git a/server/nginx.conf b/server/nginx.conf
index daadbbd..6b3f29e 100644
--- a/server/nginx.conf
+++ b/server/nginx.conf
@@ -24,7 +24,7 @@ server {
     ssl_certificate /srv/dpaste.de/var/ssl/dpaste_de_unified.crt;
     ssl_certificate_key /srv/dpaste.de/var/ssl/dpaste_de.key;
 
-    add_header Strict-Transport-Security max-age=31536000;
+    add_header Strict-Transport-Security max-age=25200;
 
     include /srv/dpaste.de/src/dpaste/server/nginx_server.conf;
 }
@@ -36,7 +36,7 @@ server {
     ssl_certificate /srv/dpaste.de/var/ssl/dpaste_org_unified.crt;
     ssl_certificate_key /srv/dpaste.de/var/ssl/dpaste_org.key;
 
-    add_header Strict-Transport-Security max-age=31536000;
+    add_header Strict-Transport-Security max-age=25200;
 
     include /srv/dpaste.de/src/dpaste/server/nginx_server.conf;
 }