diff --git a/lib/net/peer.js b/lib/net/peer.js
index 3bff434a..c024d58d 100644
--- a/lib/net/peer.js
+++ b/lib/net/peer.js
@@ -199,6 +199,14 @@ Peer.RESPONSE_TIMEOUT = 30000;
 
 Peer.BLOCK_TIMEOUT = 60000;
 
+/**
+ * Max number of requested items.
+ * @const {Number}
+ * @default
+ */
+
+Peer.MAX_REQUESTS = 5000;
+
 /**
  * Create inbound peer from socket.
  * @param {PeerOptions} options
@@ -1307,6 +1315,14 @@ Peer.prototype.maybeTimeout = function maybeTimeout() {
       return;
     }
   }
+
+  if (this.options.isFull()) {
+    if (this.requestMap.size > Peer.MAX_REQUESTS) {
+      this.error('Peer is stalling (data).');
+      this.destroy();
+      return;
+    }
+  }
 };
 
 /**