diff --git a/wildduck/haraka.yaml b/wildduck/haraka.yaml
index 0264773..ae82859 100644
--- a/wildduck/haraka.yaml
+++ b/wildduck/haraka.yaml
@@ -52,6 +52,7 @@ data:
   tls.ini: |-
     key=/cert/tls.key
     cert=/cert/tls.crt
+    dhparam=dhparams.pem
   wildduck.js: |-
     module.exports = {
       "redis": process.env.REDIS_URI,