diff --git a/README.md b/README.md
index 43fc135..6a1b89e 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,7 @@ Currently implemented are the following redis commands:
 * mset
 * msetnx
 * setex
+* psetex
 * setnx
 * ping
 
diff --git a/lib/client/redis-client.js b/lib/client/redis-client.js
index a6952f0..edcce39 100644
--- a/lib/client/redis-client.js
+++ b/lib/client/redis-client.js
@@ -369,6 +369,14 @@ RedisClient.prototype.setex = RedisClient.prototype.SETEX = function (key, secon
   });
 };
 
+RedisClient.prototype.psetex = RedisClient.prototype.PSETEX = function (key, ms, value, callback) {
+  this._selectedDb.set(key, value, () => {
+    this._selectedDb.pexpire(key, ms, (err, result) => {
+      helpers.callCallback(callback, err, "OK");
+    });
+  });
+};
+
 RedisClient.prototype.setnx = RedisClient.prototype.SETNX = function (key, value, callback) {
   this._selectedDb.setnx(key, value, callback);
 };
diff --git a/test/client/redis-mock.strings.test.js b/test/client/redis-mock.strings.test.js
index 0449219..9688da7 100644
--- a/test/client/redis-mock.strings.test.js
+++ b/test/client/redis-mock.strings.test.js
@@ -383,6 +383,54 @@ describe("setex", function () {
 
 });
 
+describe("psetex", function () {
+
+  this.timeout(5000); // eslint-disable-line no-invalid-this
+
+  it("should set a key", function (done) {
+    var key = 'test_persist';
+    r.psetex(key, 1000, "val", function (err, result) {
+      result.should.equal("OK");
+      r.get(key, function (err, result) {
+        result.should.equal("val");
+        done();
+      });
+    });
+  });
+
+  it("should set a disappearing key", function (done) {
+    var key = 'test_disappearing';
+    r.psetex(key, 1, "val", cb);
+
+    function cb(err, result) {
+      result.should.be.ok();
+
+      setTimeout(function () {
+        r.exists(key, function (err, result) {
+          result.should.equal(0);
+          done();
+        });
+      }, 100);
+    }
+  });
+
+  it("should set a key without a callback involved", function (done) {
+    var key = 'test_persist_wo_callback';
+
+    r.psetex(key, 1000, "val");
+
+    setTimeout(function () {
+      r.get(key, function (err, result) {
+        result.should.equal("val");
+        r.del(key);
+        done();
+      });
+    }, 100);
+
+  });
+
+});
+
 describe("setnx", function () {
   it("should set a key", function (done) {