diff --git a/metrics/src/config.py b/metrics/src/config.py
index 0a31b43..69cf76b 100644
--- a/metrics/src/config.py
+++ b/metrics/src/config.py
@@ -21,7 +21,7 @@
 
 ERROR_TIMEOUT = os.getenv('MONITOR_INTERVAL', 60)
 MONITOR_INTERVAL = os.getenv('MONITOR_INTERVAL', 10800)
-NETWORK_NAME = os.getenv('NETWORK_NAME', 'mainnet')
+NETWORK_NAME = os.getenv('NETWORK_NAME', 'mainnet') or 'mainnet'
 ENDPOINT = os.environ['ETH_ENDPOINT']
 
 PROXY_ENDPOINTS = {