diff --git a/docker/haproxy/haproxy-behind.conf b/docker/haproxy/haproxy-behind.conf
index 2f63895..8a25312 100644
--- a/docker/haproxy/haproxy-behind.conf
+++ b/docker/haproxy/haproxy-behind.conf
@@ -90,6 +90,7 @@ backend be_sso
   acl existing-x-forwarded-proto req.hdr(X-Forwarded-Proto) -m found
   http-request add-header X-Forwarded-Host %[req.hdr(Host)] unless existing-x-forwarded-host
   http-request add-header X-Forwarded-Proto https unless existing-x-forwarded-proto
+  http-response replace-value Set-Cookie (KEYCLOAK_LOCALE=[^;]*);(.*) \1;domain=digitaldemocratic.net;\2
 	server keycloak isard-sso-keycloak:8080 check port 8080 inter 5s rise 2 fall 10 resolvers mydns init-addr none
 
 backend be_admin
diff --git a/docker/haproxy/haproxy.conf b/docker/haproxy/haproxy.conf
index 17bba98..e5d7a17 100644
--- a/docker/haproxy/haproxy.conf
+++ b/docker/haproxy/haproxy.conf
@@ -94,6 +94,7 @@ backend be_sso
   acl existing-x-forwarded-proto req.hdr(X-Forwarded-Proto) -m found
   http-request add-header X-Forwarded-Host %[req.hdr(Host)] unless existing-x-forwarded-host
   http-request add-header X-Forwarded-Proto https unless existing-x-forwarded-proto
+  http-response replace-value Set-Cookie (KEYCLOAK_LOCALE=[^;]*);(.*) \1;domain=digitaldemocratic.net;\2
 	server keycloak isard-sso-keycloak:8080 check port 8080 inter 5s rise 2 fall 10 resolvers mydns init-addr none
 
 backend be_admin