diff --git a/_data/chains/eip155-10.json b/_data/chains/eip155-10.json
index ca033651..40e5ae54 100644
--- a/_data/chains/eip155-10.json
+++ b/_data/chains/eip155-10.json
@@ -1,5 +1,5 @@
 {
-  "name": "Optimistic Ethereum",
+  "name": "Optimism",
   "chain": "ETH",
   "rpc": ["https://mainnet.optimism.io/"],
   "faucets": [],
diff --git a/_data/chains/eip155-69.json b/_data/chains/eip155-69.json
index 25395770..bd7c54ed 100644
--- a/_data/chains/eip155-69.json
+++ b/_data/chains/eip155-69.json
@@ -1,6 +1,6 @@
 {
-  "name": "Optimistic Kovan",
-  "title": "Optimistic Ethereum Testnet Kovan",
+  "name": "Optimism Kovan",
+  "title": "Optimism Testnet Kovan",
   "chain": "ETH",
   "rpc": ["https://kovan.optimism.io/"],
   "faucets": [