diff --git a/cmdeploy/src/cmdeploy/rspamd/dkim_signing.conf.j2 b/cmdeploy/src/cmdeploy/rspamd/dkim_signing.conf.j2
index d0c5c96d..d8ed95df 100644
--- a/cmdeploy/src/cmdeploy/rspamd/dkim_signing.conf.j2
+++ b/cmdeploy/src/cmdeploy/rspamd/dkim_signing.conf.j2
@@ -1,9 +1,9 @@
-selector = {{ config.dkim_selector }}
+selector = "{{ config.dkim_selector }}"
 use_esld = false  # don't cut c1.testrun.org down to testrun.org
 domain = {
     {{ config.mail_domain }} {
         selectors [
-            selector = {{ config.dkim_selector }}
+            selector = "{{ config.dkim_selector }}"
             path = {{ config.dkim_key_path }}
         ]
     }