diff --git a/lib/bcoin/bloom.js b/lib/bcoin/bloom.js
index 929d8365..3a6de20e 100644
--- a/lib/bcoin/bloom.js
+++ b/lib/bcoin/bloom.js
@@ -15,7 +15,7 @@ function Bloom(size, n, tweak) {
   if (!(this instanceof Bloom))
     return new Bloom(size, n, tweak);
 
-  this.filter = new Array(Math.ceil(size / 32));
+  this.filter = new Buffer(Math.ceil(size / 8));
   this.size = size;
   this.n = n;
   this.tweak = tweak;
@@ -28,8 +28,7 @@ Bloom.prototype.hash = function hash(val, n) {
 };
 
 Bloom.prototype.reset = function reset() {
-  for (var i = 0; i < this.filter.length; i++)
-    this.filter[i] = 0;
+  this.filter.fill(0);
 };
 
 Bloom.prototype.add = function add(val, enc) {
@@ -41,8 +40,9 @@ Bloom.prototype.add = function add(val, enc) {
     bit = this.hash(val, i);
     pos = 1 << (bit & 0x1f);
     shift = bit >> 5;
+    shift *= 4;
 
-    this.filter[shift] |= pos;
+    utils.writeU32(this.filter, utils.readU32(this.filter, shift) | pos, shift);
   }
 };
 
@@ -55,8 +55,9 @@ Bloom.prototype.test = function test(val, enc) {
     bit = this.hash(val, i);
     pos = 1 << (bit & 0x1f);
     shift = bit >> 5;
+    shift *= 4;
 
-    if ((this.filter[shift] & pos) === 0)
+    if ((utils.readU32(this.filter, shift) & pos) === 0)
       return false;
   }
 
@@ -64,21 +65,7 @@ Bloom.prototype.test = function test(val, enc) {
 };
 
 Bloom.prototype.toBuffer = function toBuffer() {
-  var bytes = Math.ceil(this.size / 8);
-  var res = new Buffer(this.filter.length * 4);
-  var i, w;
-
-  res.fill(0);
-
-  for (i = 0; i < this.filter.length; i++) {
-    w = this.filter[i];
-    res[i * 4] = w & 0xff;
-    res[i * 4 + 1] = (w >> 8) & 0xff;
-    res[i * 4 + 2] = (w >> 16) & 0xff;
-    res[i * 4 + 3] = (w >> 24) & 0xff;
-  }
-
-  return res.slice(0, bytes);
+  return this.filter;
 };
 
 function mul32(a, b) {