diff --git a/configs/featured-networks/optimism-mainnet.json b/configs/featured-networks/optimism-mainnet.json
index 1db87968..951f6ec9 100644
--- a/configs/featured-networks/optimism-mainnet.json
+++ b/configs/featured-networks/optimism-mainnet.json
@@ -11,6 +11,12 @@
 		"group": "Testnets",
 		"icon": "https://raw.githubusercontent.com/blockscout/frontend-configs/main/configs/network-icons/optimism.svg"
 	},
+  {
+		"title": "Optimism Sepolia",
+		"url": "https://optimism-sepolia.blockscout.com/",
+		"group": "Testnets",
+		"icon": "https://raw.githubusercontent.com/blockscout/frontend-configs/main/configs/network-icons/optimism.svg"
+	},
 	{
 		"title": "Optimism Bedrock Beta",
 		"url": "https://blockscout.com/optimism/bedrock-beta",