diff --git a/src/Core/Identity/AuthenticatorTokenProvider.cs b/src/Core/Identity/AuthenticatorTokenProvider.cs
index 90102b813c..3b360a2ed8 100644
--- a/src/Core/Identity/AuthenticatorTokenProvider.cs
+++ b/src/Core/Identity/AuthenticatorTokenProvider.cs
@@ -34,7 +34,7 @@ namespace Bit.Core.Identity
             var otp = new Totp(Base32Encoding.ToBytes(user.AuthenticatorKey));
 
             long timeStepMatched;
-            var valid = otp.VerifyTotp(token, out timeStepMatched, new VerificationWindow(2, 2));
+            var valid = otp.VerifyTotp(token, out timeStepMatched, new VerificationWindow(1, 1));
 
             return Task.FromResult(valid);
         }
diff --git a/src/Core/project.json b/src/Core/project.json
index 03388c68e6..9aca94a679 100644
--- a/src/Core/project.json
+++ b/src/Core/project.json
@@ -8,7 +8,7 @@
     "Sendgrid": "6.3.4",
     "PushSharp": "4.0.10",
     "WindowsAzure.Storage": "8.0.0",
-    "Otp.NET": "1.0.0"
+    "Otp.NET": "1.0.1"
   },
 
   "frameworks": {