diff --git a/op/katana/mainnet/genesis.json b/op/katana/mainnet/genesis.json
index 4d324271..0fe6c913 100644
--- a/op/katana/mainnet/genesis.json
+++ b/op/katana/mainnet/genesis.json
@@ -25,6 +25,8 @@
     "graniteTime": 0,
     "holoceneTime": 0,
     "isthmusTime": 1746806401,
+    "pragueTime": 1746806401,
+    "osakaTime": 1773066601,
     "jovianTime": 1773066601,
     "terminalTotalDifficulty": 0,
     "terminalTotalDifficultyPassed": true,