diff --git a/src/upgrades/1.10.0/hash_recent_ip_addresses.js b/src/upgrades/1.10.0/hash_recent_ip_addresses.js
new file mode 100644
index 0000000000..9dbaea885c
--- /dev/null
+++ b/src/upgrades/1.10.0/hash_recent_ip_addresses.js
@@ -0,0 +1,35 @@
+'use strict';
+
+var db = require('../../database');
+var batch = require('../../batch');
+
+var async = require('async');
+var crypto = require('crypto');
+var nconf = require('nconf');
+
+module.exports = {
+	name: 'Hash all IP addresses stored in Recent IPs zset',
+	timestamp: Date.UTC(2017, 5, 22),
+	method: function (callback) {
+		var hashed = /[a-f0-9]{32}/;
+		let hash;
+
+		batch.processSortedSet('ip:recent', function (ips, next) {
+			async.each(ips, function (set, next) {
+				// Short circuit if already processed
+				if (hashed.test(set.value)) {
+					console.log('done already', set);
+					return setImmediate(next);
+				}
+
+				hash = crypto.createHash('sha1').update(set.value + nconf.get('secret')).digest('hex');
+				console.log('processing');
+
+				async.series([
+					async.apply(db.sortedSetAdd, 'ip:recent', set.score, hash),
+					async.apply(db.sortedSetRemove, 'ip:recent', set.value),
+				], next);
+			}, next);
+		}, { withScores: 1 }, callback);
+	},
+};