diff --git a/lib/bcoin/block.js b/lib/bcoin/block.js
index ad581d40..72ef3373 100644
--- a/lib/bcoin/block.js
+++ b/lib/bcoin/block.js
@@ -195,7 +195,9 @@ Block.prototype._checkBlock = function checkBlock() {
   }
 
   // First TX must be a coinbase
-  if (this.txs[0].inputs.length !== 1 || +this.txs[0].inputs[0].out.hash !== 0) {
+  if (!this.txs.length ||
+      this.txs[0].inputs.length !== 1 ||
+      +this.txs[0].inputs[0].out.hash !== 0) {
     return false;
   }
 
diff --git a/lib/bcoin/protocol/framer.js b/lib/bcoin/protocol/framer.js
index 94ceebcd..b25c7b5d 100644
--- a/lib/bcoin/protocol/framer.js
+++ b/lib/bcoin/protocol/framer.js
@@ -91,9 +91,8 @@ Framer.prototype.version = function version(packet) {
     p[off++] = 0;
   } else {
     off += varint(p, this.agent.length, off);
-    for (var i = 0; i < this.agent.length; i++) {
+    for (var i = 0; i < this.agent.length; i++)
       p[off++] = this.agent[i];
-    }
   }
 
   // Start height
diff --git a/lib/bcoin/protocol/parser.js b/lib/bcoin/protocol/parser.js
index f7c8dfbb..401a7967 100644
--- a/lib/bcoin/protocol/parser.js
+++ b/lib/bcoin/protocol/parser.js
@@ -215,7 +215,7 @@ Parser.prototype.parseMerkleBlock = function parseMerkleBlock(p) {
 };
 
 Parser.prototype.parseBlock = function parseBlock(p) {
-  if (p.length < 84)
+  if (p.length < 81)
     return this._error('Invalid block size');
 
   var result = readIntv(p, 80);
@@ -223,10 +223,12 @@ Parser.prototype.parseBlock = function parseBlock(p) {
   var totalTX = result.r;
   var txs = [];
 
-  for (var i = 0; i < totalTX; i++) {
-    var tx = this.parseTX(p.slice(off));
-    off += tx._off;
-    txs.push(tx);
+  if (p.length >= off + 10) {
+    for (var i = 0; i < totalTX; i++) {
+      var tx = this.parseTX(p.slice(off));
+      off += tx._off;
+      txs.push(tx);
+    }
   }
 
   return {