diff --git a/roles/mongodb/tasks/main.yml b/roles/mongodb/tasks/main.yml
index 828356c..329e17d 100644
--- a/roles/mongodb/tasks/main.yml
+++ b/roles/mongodb/tasks/main.yml
@@ -111,6 +111,7 @@
           --logRotate reopen \
           --nounixsocket
           --replSet rs0 \
+          --maxConns 16384 \
           --tlsMode requireTLS \
           --tlsCertificateKeyFile {{ tls_private }}/mongodb.pem
           --tlsCAFile {{ tls_certs }}/ca.crt