diff --git a/docker/tls/mongod-server-named.conf b/docker/tls/mongod-server-named.conf
index 26d1d8d..44d1896 100644
--- a/docker/tls/mongod-server-named.conf
+++ b/docker/tls/mongod-server-named.conf
@@ -4,6 +4,7 @@ net:
   tls:
     mode: requireTLS
     certificateKeyFile: /etc/mongod/tls/server-named.pem
+    CAFile: /etc/mongod/tls/ca.pem
     allowInvalidCertificates: true
     allowInvalidHostnames: true