diff --git a/ethcore/res/ethereum/kotti.json b/ethcore/res/ethereum/kotti.json
index 960ee4c4a..6da59fbbe 100644
--- a/ethcore/res/ethereum/kotti.json
+++ b/ethcore/res/ethereum/kotti.json
@@ -12,6 +12,8 @@
 	"params": {
 		"accountStartNonce": "0x0",
 		"chainID": "0x6",
+		"forkBlock": "0x1febd1",
+		"forkCanonHash": "0x5e870cdcb252261bd5e7ed3499f42a8f7b9ef6ce08ece55e8187247cc0551f4c",
 		"eip140Transition": "0xaef49",
 		"eip145Transition": "0x1a064d",
 		"eip150Transition": "0x0",
@@ -57,7 +59,11 @@
 		"enode://93c94e999be5dd854c5d82a7cf5c14822973b5d9badb56ad4974586ec4d4f1995c815af795c20bb6e0a6226d3ee55808435c4dc89baf94ee581141b064d19dfc@80.187.116.161:25720",
 		"enode://ae8658da8d255d1992c3ec6e62e11d6e1c5899aa1566504bc1ff96a0c9c8bd44838372be643342553817f5cc7d78f1c83a8093dee13d77b3b0a583c050c81940@18.232.185.151:30303",
 		"enode://b477ca6d507a3f57070783eb62ba838847635f8b1a0cbffb8b7f8173f5894cf550f0225a5c279341e2d862a606e778b57180a4f1db3db78c51eadcfa4fdc6963@40.68.240.160:30303",
-		"enode://a59e33ccd2b3e52d578f1fbd70c6f9babda2650f0760d6ff3b37742fdcdfdb3defba5d56d315b40c46b70198c7621e63ffa3f987389c7118634b0fefbbdfa7fd@51.158.191.43:37956"
+		"enode://4956f6924335c951cb70cbc169a85c081f6ff0b374aa2815453b8a3132b49613f38a1a6b8e103f878dbec86364f60091e92a376d7cd3aca9d82d2f2554794e63@51.15.97.240:41235",
+		"enode://6c9a052c01bb9995fa53bebfcdbc17733fe90708270d0e6d8e38dc57b32e1dbe8c287590b634ee9753b94ba302f411c96519c7fa07df0df6a6848149d819b2c5@51.15.70.7:41235",
+		"enode://95a7302fd8f35d9ad716a591b90dfe839dbf2d3d6a6737ef39e07899f844ad82f1659dd6212492922dd36705fb0a1e984c1d5d5c42069d5bd329388831e820c1@51.15.97.240:45678",
+		"enode://8c5c4dec9a0728c7058d3c29698bae888adc244e443cebc21f3d708a20751511acbf98a52b5e5ea472f8715c658913e8084123461fd187a4980a0600420b0791@51.15.70.7:45678",
+		"enode://efd7391a3bed73ad74ae5760319bb48f9c9f1983ff22964422688cdb426c5d681004ece26c47121396653cf9bafe7104aa4ecff70e24cc5b11fd76be8e5afce0@51.158.191.43:45678"
 	],
 	"accounts": {
 		"0x0000000000000000000000000000000000000000": {
diff --git a/ethcore/res/ethereum/mordor.json b/ethcore/res/ethereum/mordor.json
index 357648d2d..4d05af6e4 100644
--- a/ethcore/res/ethereum/mordor.json
+++ b/ethcore/res/ethereum/mordor.json
@@ -24,8 +24,8 @@
 		"minGasLimit": "0x1388",
 		"networkID": "0x7",
 		"chainID": "0x3f",
-		"forkBlock": "0xcd16a",
-		"forkCanonHash": "0x7b4145006cddae9e88c13b47d6aeee2ab4c37d561b929cf688f6f35d58d1966b",
+		"forkBlock": "0x10e9ea",
+		"forkCanonHash": "0xeda92acf75878dca138231b565fe09ee59157818f459fe07e168e3a373bb083f",
 		"eip150Transition": "0x0",
 		"eip160Transition": "0x0",
 		"eip161abcTransition": "0x0",