diff --git a/lib/chain/chain.js b/lib/chain/chain.js
index ac70a02c..5445b196 100644
--- a/lib/chain/chain.js
+++ b/lib/chain/chain.js
@@ -508,6 +508,9 @@ Chain.prototype.getDeployments = co(function* getDeployments(block, prev, ancest
     }
   }
 
+  if (this.network.oldWitness)
+    return state;
+
   // CHECKSEQUENCEVERIFY and median time
   // past locktimes are now usable (bip9 & bip113).
   active = yield this.isActive(prev, 'csv');
@@ -520,16 +523,14 @@ Chain.prototype.getDeployments = co(function* getDeployments(block, prev, ancest
   }
 
   // Segregrated witness is now usable (bip141 - segnet4)
-  if (!this.network.oldWitness) {
-    active = yield this.isActive(prev, 'witness');
-    if (active) {
-      // BIP147
-      // state.flags |= constants.flags.VERIFY_NULLDUMMY;
-      if (this.options.witness) {
-        state.flags |= constants.flags.VERIFY_WITNESS;
-        if (!this.state.hasWitness())
-          this.logger.warning('Segwit has been activated.');
-      }
+  active = yield this.isActive(prev, 'witness');
+  if (active) {
+    // BIP147
+    // state.flags |= constants.flags.VERIFY_NULLDUMMY;
+    if (this.options.witness) {
+      state.flags |= constants.flags.VERIFY_WITNESS;
+      if (!this.state.hasWitness())
+        this.logger.warning('Segwit has been activated.');
     }
   }
 
diff --git a/lib/protocol/networks.js b/lib/protocol/networks.js
index 518d8fcd..89edf9ad 100644
--- a/lib/protocol/networks.js
+++ b/lib/protocol/networks.js
@@ -261,6 +261,30 @@ main.block = {
 
   bip34hash: 'b808089c756add1591b1d17bab44bba3fed9e02f942ab4894b02000000000000',
 
+  /**
+   * Height at which bip65 was activated.
+   */
+
+  bip65height: 388381,
+
+  /**
+   * Hash of the block that activated bip65.
+   */
+
+  bip65hash: 'f035476cfaeb9f677c2cdad00fd908c556775ded24b6c2040000000000000000',
+
+  /**
+   * Height at which bip66 was activated.
+   */
+
+  bip66height: 363725,
+
+  /**
+   * Hash of the block that activated bip66.
+   */
+
+  bip66hash: '3109b588941188a9f1c2576aae462d729b8cce9da1ea79030000000000000000',
+
   /**
    * Safe height to start pruning.
    */
@@ -445,10 +469,10 @@ testnet = network.testnet = {};
 testnet.type = 'testnet';
 
 testnet.seeds = [
- 'testnet-seed.alexykot.me',
- 'testnet-seed.bitcoin.petertodd.org',
- 'testnet-seed.bluematt.me',
- 'testnet-seed.bitcoin.schildbach.de'
+  'testnet-seed.bitcoin.jonasschnelli.ch',
+  'seed.tbtc.petertodd.org',
+  'testnet-seed.bluematt.me',
+  'testnet-seed.bitcoin.schildbach.de'
 ];
 
 testnet.magic = 0x0709110b;
@@ -524,6 +548,10 @@ testnet.block = {
   majorityWindow: 100,
   bip34height: 21111,
   bip34hash: 'f88ecd9912d00d3f5c2a8e0f50417d3e415c75b3abe584346da9b32300000000',
+  bip65height: 581885,
+  bip65hash: 'b61e864fbec41dfaf09da05d1d76dc068b0dd82ee7982ff255667f0000000000',
+  bip66height: 330776,
+  bip66hash: '82a14b9e5ea81d4832b8e2cd3c2a6092b5a3853285a8995ec4c8042100000000',
   pruneAfterHeight: 1000,
   // maxTipAge: 0x7fffffff
   maxTipAge: 24 * 60 * 60,
@@ -667,6 +695,10 @@ regtest.block = {
   majorityWindow: 1000,
   bip34height: -1,
   bip34hash: null,
+  bip65height: 1351,
+  bip65hash: null,
+  bip66height: 1251,
+  bip66hash: null,
   pruneAfterHeight: 1000,
   maxTipAge: 24 * 60 * 60,
   slowHeight: 0x7fffffff
@@ -805,8 +837,14 @@ segnet3.block = {
   majorityEnforceUpgrade: 7,
   majorityRejectOutdated: 9,
   majorityWindow: 10,
-  bip34height: -1,
-  bip34hash: null,
+  bip34height: 8,
+  bip34hash: '1c2a2898cebca152f872fa71b756903711ad778c7d63ba6b73c140f800000000',
+  bip65height: 8,
+  bip65hash: '1c2a2898cebca152f872fa71b756903711ad778c7d63ba6b73c140f800000000',
+  bip66height: 8,
+  bip66hash: '1c2a2898cebca152f872fa71b756903711ad778c7d63ba6b73c140f800000000',
+  bip141height: 8,
+  bip141hash: '1c2a2898cebca152f872fa71b756903711ad778c7d63ba6b73c140f800000000',
   pruneAfterHeight: 1000,
   // maxTipAge: 0x7fffffff,
   maxTipAge: 24 * 60 * 60,
@@ -921,8 +959,12 @@ segnet4.block = {
   majorityEnforceUpgrade: 7,
   majorityRejectOutdated: 9,
   majorityWindow: 10,
-  bip34height: -1,
-  bip34hash: null,
+  bip34height: 8,
+  bip34hash: '6c48386dc7c460defabb5640e28b6510a5f238cdbe6756c2976a7e0913000000',
+  bip65height: 8,
+  bip65hash: '6c48386dc7c460defabb5640e28b6510a5f238cdbe6756c2976a7e0913000000',
+  bip66height: 8,
+  bip66hash: '6c48386dc7c460defabb5640e28b6510a5f238cdbe6756c2976a7e0913000000',
   pruneAfterHeight: 1000,
   // maxTipAge: 0x7fffffff,
   maxTipAge: 24 * 60 * 60,
@@ -1059,8 +1101,12 @@ simnet.block = {
   majorityEnforceUpgrade: 51,
   majorityRejectOutdated: 75,
   majorityWindow: 100,
-  bip34height: -1,
-  bip34hash: null,
+  bip34height: 0,
+  bip34hash: 'f67ad7695d9b662a72ff3d8edbbb2de0bfa67b13974bb9910d116d5cbd863e68',
+  bip65height: 0,
+  bip65hash: 'f67ad7695d9b662a72ff3d8edbbb2de0bfa67b13974bb9910d116d5cbd863e68',
+  bip66height: 0,
+  bip66hash: 'f67ad7695d9b662a72ff3d8edbbb2de0bfa67b13974bb9910d116d5cbd863e68',
   pruneAfterHeight: 1000,
   maxTipAge: 0x7fffffff,
   slowHeight: 0