diff --git a/ethcore/res/ethereum/foundation.json b/ethcore/res/ethereum/foundation.json
index 2522a09ae..69f150fad 100644
--- a/ethcore/res/ethereum/foundation.json
+++ b/ethcore/res/ethereum/foundation.json
@@ -9,8 +9,7 @@
 				"durationLimit": "0xd",
 				"blockReward": {
 					"0x0": "0x4563918244f40000",
-					"0x42ae50": "0x29a2241af62c0000",
-					"0x6c0840": "0x1bc16d674ec80000"
+					"0x42ae50": "0x29a2241af62c0000"
 				},
 				"homesteadTransition": "0x118c30",
 				"daoHardforkTransition": "0x1d4c00",
@@ -135,8 +134,7 @@
 				],
 				"eip100bTransition": "0x42ae50",
 				"difficultyBombDelays": {
-					"0x42ae50": "0x2dc6c0",
-					"0x6c0840": "0x1e8480"
+					"0x42ae50": "0x2dc6c0"
 				}
 			}
 		}
@@ -160,11 +158,7 @@
 		"eip140Transition": "0x42ae50",
 		"eip211Transition": "0x42ae50",
 		"eip214Transition": "0x42ae50",
-		"eip658Transition": "0x42ae50",
-		"eip145Transition": "0x6c0840",
-		"eip1014Transition": "0x6c0840",
-		"eip1052Transition": "0x6c0840",
-		"eip1283Transition": "0x6c0840"
+		"eip658Transition": "0x42ae50"
 	},
 	"genesis": {
 		"seal": {
diff --git a/util/version/Cargo.toml b/util/version/Cargo.toml
index 5c8266d6f..f778d290e 100644
--- a/util/version/Cargo.toml
+++ b/util/version/Cargo.toml
@@ -16,9 +16,9 @@ track = "nightly"
 # Latest supported fork blocks.
 # Indicates a critical release in this track (i.e. consensus issue).
 [package.metadata.networks]
-foundation = { forkBlock = 7080000, critical = false }
+foundation = { forkBlock = 4370000, critical = true }
 ropsten = { forkBlock = 4230000, critical = false }
-kovan = { forkBlock = 9200000, critical = false }
+kovan = { forkBlock = 9200000, critical = true }
 
 [dependencies]
 parity-bytes = "0.1"