diff --git a/src/Microsoft.IdentityModel.Tokens/SymmetricSecurityKey.cs b/src/Microsoft.IdentityModel.Tokens/SymmetricSecurityKey.cs
index 8ad1c49240..7d84b9ece6 100644
--- a/src/Microsoft.IdentityModel.Tokens/SymmetricSecurityKey.cs
+++ b/src/Microsoft.IdentityModel.Tokens/SymmetricSecurityKey.cs
@@ -2,7 +2,6 @@
 // Licensed under the MIT License.
 
 using System;
-using System.Security.Cryptography;
 using Microsoft.IdentityModel.Logging;
 
 namespace Microsoft.IdentityModel.Tokens