diff --git a/tasks/configure.yml b/tasks/configure.yml
index 8120152..cb85dbd 100644
--- a/tasks/configure.yml
+++ b/tasks/configure.yml
@@ -75,7 +75,7 @@
     capability: CAP_NET_BIND_SERVICE+ep
     state: present
   when:
-    - grafana_port <= 1024
+    - grafana_port | int <= 1024
     - grafana_cap_net_bind_service
 
 - name: Enable and start Grafana systemd unit
diff --git a/tasks/preflight.yml b/tasks/preflight.yml
index 19cd15d..6224312 100644
--- a/tasks/preflight.yml
+++ b/tasks/preflight.yml
@@ -74,7 +74,7 @@
   fail:
     msg: Trying to use a port lower than 1024 without setting grafana_cap_net_bind_service.
   when:
-    - grafana_port <= 1024
+    - grafana_port | int <= 1024
     - not grafana_cap_net_bind_service
 
 - name: Fail if grafana_server.socket not defined when in socket mode