diff --git a/lib/wallet/account.js b/lib/wallet/account.js
index 865673b4..333b290d 100644
--- a/lib/wallet/account.js
+++ b/lib/wallet/account.js
@@ -218,7 +218,7 @@ Account.fromOptions = function fromOptions(db, options) {
  * @const {Number}
  */
 
-Account.MAX_LOOKAHEAD = 50;
+Account.MAX_LOOKAHEAD = 40;
 
 /**
  * Attempt to intialize the account (generating
@@ -726,15 +726,36 @@ Account.prototype.syncDepth = co(function* syncDepth(receive, change, nested) {
  */
 
 Account.prototype.setLookahead = co(function* setLookahead(lookahead) {
-  var i, key, depth, target;
+  var i, diff, key, depth, target;
 
-  if (lookahead <= this.lookahead) {
+  if (lookahead === this.lookahead) {
     this.db.logger.warning(
-      'Lookahead is not increasing for: %s/%s.',
+      'Lookahead is not changing for: %s/%s.',
       this.id, this.name);
     return;
   }
 
+  if (lookahead < this.lookahead) {
+    diff = this.lookahead - lookahead;
+
+    this.receiveDepth += diff;
+    this.receive = this.deriveReceive(this.receiveDepth - 1);
+
+    this.changeDepth += diff;
+    this.change = this.deriveChange(this.changeDepth - 1);
+
+    if (this.witness) {
+      this.nestedDepth += diff;
+      this.nested = this.deriveNested(this.nestedDepth - 1);
+    }
+
+    this.lookahead = lookahead;
+
+    this.save();
+
+    return;
+  }
+
   depth = this.receiveDepth + this.lookahead
   target = this.receiveDepth + lookahead;