diff --git a/crates/genesis/src/mainnet.genesis.json b/crates/genesis/src/mainnet.genesis.json
index c269bb54..bcafc363 100644
--- a/crates/genesis/src/mainnet.genesis.json
+++ b/crates/genesis/src/mainnet.genesis.json
@@ -66,7 +66,7 @@
     "depositContractAddress": null
   },
   "nonce": "0x0",
-  "timestamp": "0x0",
+  "timestamp": "0x690b792f",
   "extraData": "0x",
   "gasLimit": "0x1c9c380",
   "difficulty": "0x0",
diff --git a/crates/genesis/src/pecorino.genesis.json b/crates/genesis/src/pecorino.genesis.json
index 235f1a77..5a38950a 100644
--- a/crates/genesis/src/pecorino.genesis.json
+++ b/crates/genesis/src/pecorino.genesis.json
@@ -66,7 +66,7 @@
     "depositContractAddress": null
   },
   "nonce": "0x0",
-  "timestamp": "0x0",
+  "timestamp": "0x6894e6bd",
   "extraData": "0x",
   "gasLimit": "0x1c9c380",
   "difficulty": "0x0",