diff --git a/source/AccessTokenValidation.Tests/AccessTokenValidation.Tests.csproj b/source/AccessTokenValidation.Tests/AccessTokenValidation.Tests.csproj
index 4566501..d803a4f 100644
--- a/source/AccessTokenValidation.Tests/AccessTokenValidation.Tests.csproj
+++ b/source/AccessTokenValidation.Tests/AccessTokenValidation.Tests.csproj
@@ -43,7 +43,7 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="IdentityModel.Net45, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\IdentityModel.1.1.0\lib\net45\IdentityModel.Net45.dll</HintPath>
+      <HintPath>..\packages\IdentityModel.1.2.1\lib\net45\IdentityModel.Net45.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">