diff --git a/network/src/consensus.rs b/network/src/consensus.rs
index d24c1d13..637e7f76 100644
--- a/network/src/consensus.rs
+++ b/network/src/consensus.rs
@@ -7,11 +7,14 @@ pub struct ConsensusParams {
 	/// Time when BIP16 becomes active.
 	/// See https://github.com/bitcoin/bips/blob/master/bip-0016.mediawiki
 	pub bip16_time: u32,
+	/// Block height at which BIP34 becomes active.
+	/// See https://github.com/bitcoin/bips/blob/master/bip-0034.mediawiki
+	pub bip34_height: u32,
 	/// Block height at which BIP65 becomes active.
 	/// See https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki
 	pub bip65_height: u32,
 	/// Block height at which BIP65 becomes active.
-	/// See https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki
+	/// See https://github.com/bitcoin/bips/blob/master/bip-0066.mediawiki
 	pub bip66_height: u32,
 }
 
@@ -20,18 +23,21 @@ impl ConsensusParams {
 		match magic {
 			Magic::Mainnet | Magic::Other(_) => ConsensusParams {
 				bip16_time: 1333238400,	// Apr 1 2012
+				bip34_height: 227931,	// 000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8
 				bip65_height: 388381,	// 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
 				bip66_height: 363725,	// 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931
 			},
 			Magic::Testnet => ConsensusParams {
 				bip16_time: 1333238400,	// Apr 1 2012
+				bip34_height: 21111,	// 0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8
 				bip65_height: 581885,	// 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6
 				bip66_height: 330776,	// 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182
 			},
 			Magic::Regtest | Magic::Unitest => ConsensusParams {
 				bip16_time: 1333238400,	// Apr 1 2012
+				bip34_height: 100000000,	// not activated on regtest
 				bip65_height: 1351,
-				bip66_height: 1251,
+				bip66_height: 1251,		// used only in rpc tests
 			},
 		}
 	}
@@ -47,6 +53,13 @@ mod tests {
 	use super::super::Magic;
 	use super::ConsensusParams;
 
+	#[test]
+	fn test_consensus_params_bip34_height() {
+		assert_eq!(ConsensusParams::with_magic(Magic::Mainnet).bip34_height, 227931);
+		assert_eq!(ConsensusParams::with_magic(Magic::Testnet).bip34_height, 21111);
+		assert_eq!(ConsensusParams::with_magic(Magic::Regtest).bip34_height, 100000000);
+	}
+
 	#[test]
 	fn test_consensus_params_bip65_height() {
 		assert_eq!(ConsensusParams::with_magic(Magic::Mainnet).bip65_height, 388381);
diff --git a/verification/src/accept_header.rs b/verification/src/accept_header.rs
index 7bbbf7e5..d6682890 100644
--- a/verification/src/accept_header.rs
+++ b/verification/src/accept_header.rs
@@ -1,7 +1,6 @@
-use network::Magic;
+use network::{Magic, ConsensusParams};
 use db::BlockHeaderProvider;
 use canon::CanonHeader;
-use constants::MIN_BLOCK_VERSION;
 use error::Error;
 use work::work_required;
 use timestamp::median_timestamp;
@@ -14,9 +13,10 @@ pub struct HeaderAcceptor<'a> {
 
 impl<'a> HeaderAcceptor<'a> {
 	pub fn new(store: &'a BlockHeaderProvider, network: Magic, header: CanonHeader<'a>, height: u32) -> Self {
+		let params = network.consensus_params();
 		HeaderAcceptor {
 			// TODO: check last 1000 blocks instead of hardcoding the value
-			version: HeaderVersion::new(header, MIN_BLOCK_VERSION),
+			version: HeaderVersion::new(header, height, params),
 			work: HeaderWork::new(header, store, height, network),
 			median_timestamp: HeaderMedianTimestamp::new(header, store, network),
 		}
@@ -30,21 +30,27 @@ impl<'a> HeaderAcceptor<'a> {
 	}
 }
 
+/// Conforms to BIP90
+/// https://github.com/bitcoin/bips/blob/master/bip-0090.mediawiki
 pub struct HeaderVersion<'a> {
 	header: CanonHeader<'a>,
-	min_version: u32,
+	height: u32,
+	consensus_params: ConsensusParams,
 }
 
 impl<'a> HeaderVersion<'a> {
-	fn new(header: CanonHeader<'a>, min_version: u32) -> Self {
+	fn new(header: CanonHeader<'a>, height: u32, consensus_params: ConsensusParams) -> Self {
 		HeaderVersion {
 			header: header,
-			min_version: min_version,
+			height: height,
+			consensus_params: consensus_params,
 		}
 	}
 
 	fn check(&self) -> Result<(), Error> {
-		if self.header.raw.version < self.min_version {
+		if (self.header.raw.version < 2 && self.height >= self.consensus_params.bip34_height) ||
+			(self.header.raw.version < 3 && self.height >= self.consensus_params.bip65_height) ||
+			(self.header.raw.version < 4 && self.height >= self.consensus_params.bip66_height) {
 			Err(Error::OldVersionBlock)
 		} else {
 			Ok(())
diff --git a/verification/src/constants.rs b/verification/src/constants.rs
index 9c8faab9..6b96d732 100644
--- a/verification/src/constants.rs
+++ b/verification/src/constants.rs
@@ -6,7 +6,6 @@ pub const MAX_BLOCK_SIZE: usize = 1_000_000;
 pub const MAX_BLOCK_SIGOPS: usize = 20_000;
 pub const MIN_COINBASE_SIZE: usize = 2;
 pub const MAX_COINBASE_SIZE: usize = 100;
-pub const MIN_BLOCK_VERSION: u32 = 0;
 
 pub const RETARGETING_FACTOR: u32 = 4;
 pub const TARGET_SPACING_SECONDS: u32 = 10 * 60;