diff --git a/roles/drone-runner/tasks/main.yml b/roles/drone-runner/tasks/main.yml
index 5754d4b..51af7f2 100644
--- a/roles/drone-runner/tasks/main.yml
+++ b/roles/drone-runner/tasks/main.yml
@@ -8,7 +8,7 @@
       DRONE_RPC_PROTO: "https"
       DRONE_RPC_HOST: "{{ drone_domain }}"
       DRONE_RPC_SECRET: "{{ drone_secret }}"
-      DRONE_RUNNER_CAPACITY: 2
+      DRONE_RUNNER_CAPACITY: "2"
       DRONE_RUNNER_NAME: "{{ ansible_fqdn }}"
       DRONE_UI_USERNAME: "admin"
       DRONE_UI_PASSWORD: "{{ drone_uipass }}"