diff --git a/op/katana/mainnet/genesis.json b/op/katana/mainnet/genesis.json
index 5809f826..4d324271 100644
--- a/op/katana/mainnet/genesis.json
+++ b/op/katana/mainnet/genesis.json
@@ -24,6 +24,8 @@
     "fjordTime": 0,
     "graniteTime": 0,
     "holoceneTime": 0,
+    "isthmusTime": 1746806401,
+    "jovianTime": 1773066601,
     "terminalTotalDifficulty": 0,
     "terminalTotalDifficultyPassed": true,
     "depositContractAddress": "0x0000000000000000000000000000000000000000",