diff --git a/src/collectors/container_collector.py b/src/collectors/container_collector.py
index e7de4e6..4ffc2e4 100644
--- a/src/collectors/container_collector.py
+++ b/src/collectors/container_collector.py
@@ -203,6 +203,10 @@ class ContainerCollector(BaseCollector):
             blkio_stats = stats.get('blkio_stats', {})
             io_service_bytes = blkio_stats.get('io_service_bytes_recursive', [])
             
+            # Handle case where io_service_bytes might be None
+            if io_service_bytes is None:
+                io_service_bytes = []
+            
             read_bytes = 0
             write_bytes = 0