diff --git a/src/Hl7.Fhir.Support.Tests/Hl7.Fhir.Support.Tests.csproj b/src/Hl7.Fhir.Support.Tests/Hl7.Fhir.Support.Tests.csproj
index 832a86790..26dc1ed08 100644
--- a/src/Hl7.Fhir.Support.Tests/Hl7.Fhir.Support.Tests.csproj
+++ b/src/Hl7.Fhir.Support.Tests/Hl7.Fhir.Support.Tests.csproj
@@ -16,7 +16,7 @@
   <ItemGroup Condition="'$(TargetFramework)' != 'net40'">
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
     <PackageReference Include="System.AppContext" Version="4.3.0" />
-    <PackageReference Include="System.Threading.Tasks.Dataflow" Version="6.0.0" />
+    <PackageReference Include="System.Threading.Tasks.Dataflow" Version="7.0.0" />
     <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
   </ItemGroup>
 
diff --git a/src/Hl7.FhirPath.Tests/HL7.FhirPath.Tests.csproj b/src/Hl7.FhirPath.Tests/HL7.FhirPath.Tests.csproj
index f7fd79744..cdde42f53 100644
--- a/src/Hl7.FhirPath.Tests/HL7.FhirPath.Tests.csproj
+++ b/src/Hl7.FhirPath.Tests/HL7.FhirPath.Tests.csproj
@@ -13,7 +13,7 @@
   </ItemGroup>
 
   <ItemGroup>  
-    <PackageReference Include="System.Threading.Tasks.Dataflow" Version="6.0.0" />
+    <PackageReference Include="System.Threading.Tasks.Dataflow" Version="7.0.0" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
   </ItemGroup>