diff --git a/ethcore/res/ethereum/expanse.json b/ethcore/res/ethereum/expanse.json
index ec7e737ead6..8b59a23954f 100644
--- a/ethcore/res/ethereum/expanse.json
+++ b/ethcore/res/ethereum/expanse.json
@@ -16,7 +16,12 @@
 				"eip150Transition": "0x927C0",
 				"eip160Transition": "0x927C0",
 				"eip161abcTransition": "0x927C0",
-				"eip161dTransition": "0x927C0"
+				"eip161dTransition": "0x927C0",
+				"eip649Reward": "0x3782DACE9D900000",
+				"eip100bTransition": 800000,
+				"eip649Transition": 800000,
+				"expip2DurationLimit": "0x1E",
+				"expip2Transition": 800000
 			}
 		}
 	},
@@ -31,7 +36,11 @@
 		"subprotocolName": "exp",
 		"eip98Transition": "0x7fffffffffffff",
 		"eip86Transition": "0x7fffffffffffff",
-		"eip155Transition": "0x927C0"
+		"eip155Transition": "0x927C0",
+		"eip140Transition": 800000,
+		"eip211Transition": 800000,
+		"eip214Transition": 800000,
+		"eip658Transition": 800000
 	},
 	"genesis": {
 		"seal": {
@@ -61,6 +70,10 @@
 		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
 		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
 		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
+		"0000000000000000000000000000000000000005": { "builtin": { "name": "modexp", "activate_at": 800000, "pricing": { "modexp": { "divisor": 20 } } } },
+		"0000000000000000000000000000000000000006": { "builtin": { "name": "alt_bn128_add", "activate_at": 800000, "pricing": { "linear": { "base": 500, "word": 0 } } } },
+		"0000000000000000000000000000000000000007": { "builtin": { "name": "alt_bn128_mul", "activate_at": 800000, "pricing": { "linear": { "base": 40000, "word": 0 } } } },
+		"0000000000000000000000000000000000000008": { "builtin": { "name": "alt_bn128_pairing", "activate_at": 800000, "pricing": { "alt_bn128_pairing": { "base": 100000, "pair": 80000 } } } },
 		"bb94f0ceb32257275b2a7a9c094c13e469b4563e": {
 			"balance": "10000000000000000000000000"
 		},
diff --git a/ethcore/src/ethereum/ethash.rs b/ethcore/src/ethereum/ethash.rs
index 9548fe5113e..fde38449cca 100644
--- a/ethcore/src/ethereum/ethash.rs
+++ b/ethcore/src/ethereum/ethash.rs
@@ -90,6 +90,10 @@ pub struct EthashParams {
 	pub eip649_delay: u64,
 	/// EIP-649 base reward.
 	pub eip649_reward: Option<U256>,
+	/// EXPIP-2 duration limit
+	pub expip2_duration_limit: u64,
+	/// EXPIP-2 block height
+	pub expip2_transition: u64,
 }
 
 impl From<ethjson::spec::EthashParams> for EthashParams {
@@ -355,7 +359,14 @@ impl Ethash {
 			self.ethash_params.difficulty_bound_divisor
 		};
 
-		let duration_limit = self.ethash_params.duration_limit;
+		let expip2_hardfork = header.number() > self.ethash_params.expip2_transition;
+
+		let duration_limit = if expip2_hardfork {
+			self.ethash_params.expip2_duration_limit
+		}else{
+			self.ethash_params.duration_limit
+		}
+
 		let frontier_limit = self.ethash_params.homestead_transition;
 
 		let mut target = if header.number() < frontier_limit {
@@ -520,7 +531,7 @@ mod tests {
 		let (eras, reward) = ecip1017_eras_block_reward(eras_rounds, start_reward, block_number);
 		assert_eq!(15, eras);
 		assert_eq!(U256::from_str("271000000000000").unwrap(), reward);
-		
+
 		let block_number = 250000000;
 		let (eras, reward) = ecip1017_eras_block_reward(eras_rounds, start_reward, block_number);
 		assert_eq!(49, eras);