diff --git a/src/Avalara.AvaTax.netstandard11.csproj b/src/Avalara.AvaTax.netstandard11.csproj
index 98eb116..97517b1 100644
--- a/src/Avalara.AvaTax.netstandard11.csproj
+++ b/src/Avalara.AvaTax.netstandard11.csproj
@@ -22,7 +22,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="System.Net.Http" Version="4.3.2" />
   </ItemGroup>
 
diff --git a/tests/netstandard/Tests.Avalara.AvaTax.netstandard11.csproj b/tests/netstandard/Tests.Avalara.AvaTax.netstandard11.csproj
index c1dc86a..edee0e1 100644
--- a/tests/netstandard/Tests.Avalara.AvaTax.netstandard11.csproj
+++ b/tests/netstandard/Tests.Avalara.AvaTax.netstandard11.csproj
@@ -16,7 +16,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0" />
     <PackageReference Include="Microsoft.NETCore.Portable.Compatibility" Version="1.0.1" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="NUnit" Version="3.6.1" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.9.0" />
   </ItemGroup>