diff --git a/stack_orchestrator/deploy/k8s/cluster_info.py b/stack_orchestrator/deploy/k8s/cluster_info.py
index fe953325..0fa3ebcb 100644
--- a/stack_orchestrator/deploy/k8s/cluster_info.py
+++ b/stack_orchestrator/deploy/k8s/cluster_info.py
@@ -86,10 +86,10 @@ class ClusterInfo:
             for service_name in services:
                 service_info = services[service_name]
                 if "ports" in service_info:
-                    for raw_port in service_info["ports"]:
+                    for raw_port in [ str(p) for p in service_info["ports"] ]:
                         if opts.o.debug:
                             print(f"service port: {raw_port}")
-                        if type(raw_port) is str and ":" in raw_port:
+                        if ":" in raw_port:
                             parts = raw_port.split(":")
                             if len(parts) != 2:
                                 raise Exception(f"Invalid port definition: {raw_port}")