diff --git a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.Core.UnitTests/Microsoft.Health.Fhir.Anonymizer.R4.Core.UnitTests.csproj b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.Core.UnitTests/Microsoft.Health.Fhir.Anonymizer.R4.Core.UnitTests.csproj
index f99cb13b..55784fc8 100644
--- a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.Core.UnitTests/Microsoft.Health.Fhir.Anonymizer.R4.Core.UnitTests.csproj
+++ b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.Core.UnitTests/Microsoft.Health.Fhir.Anonymizer.R4.Core.UnitTests.csproj
@@ -6,8 +6,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Hl7.Fhir.R4" Version="4.2.1" />
-    <PackageReference Include="Hl7.FhirPath" Version="4.2.1" />
+    <PackageReference Include="Hl7.Fhir.R4" Version="5.0.0" />
+    <PackageReference Include="Hl7.Fhir.Base" Version="5.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
     <PackageReference Include="xunit" Version="2.4.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
diff --git a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.Core/Microsoft.Health.Fhir.Anonymizer.R4.Core.csproj b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.Core/Microsoft.Health.Fhir.Anonymizer.R4.Core.csproj
index cecad82a..bf1cf3a6 100644
--- a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.Core/Microsoft.Health.Fhir.Anonymizer.R4.Core.csproj
+++ b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.Core/Microsoft.Health.Fhir.Anonymizer.R4.Core.csproj
@@ -10,8 +10,8 @@
 
   <ItemGroup>
     <PackageReference Include="Ensure.That" Version="9.2.0" />
-    <PackageReference Include="Hl7.Fhir.R4" Version="4.2.1" />
-    <PackageReference Include="Hl7.FhirPath" Version="4.2.1" />
+    <PackageReference Include="Hl7.Fhir.R4" Version="5.0.0" />
+    <PackageReference Include="Hl7.Fhir.Base" Version="5.0.0" />
     <PackageReference Include="MathNet.Numerics" Version="4.11.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="3.1.2" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
diff --git a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.FunctionalTests/Microsoft.Health.Fhir.Anonymizer.R4.FunctionalTests.csproj b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.FunctionalTests/Microsoft.Health.Fhir.Anonymizer.R4.FunctionalTests.csproj
index 9d693432..79198df7 100644
--- a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.FunctionalTests/Microsoft.Health.Fhir.Anonymizer.R4.FunctionalTests.csproj
+++ b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.R4.FunctionalTests/Microsoft.Health.Fhir.Anonymizer.R4.FunctionalTests.csproj
@@ -6,8 +6,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Hl7.Fhir.R4" Version="4.2.1" />
-    <PackageReference Include="Hl7.FhirPath" Version="4.2.1" />
+    <PackageReference Include="Hl7.Fhir.R4" Version="5.0.0" />
+	<PackageReference Include="Hl7.Fhir.Base" Version="5.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="xunit" Version="2.4.0" />
diff --git a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.UnitTests/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.UnitTests.csproj b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.UnitTests/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.UnitTests.csproj
index 9c29538b..b1f2b200 100644
--- a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.UnitTests/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.UnitTests.csproj
+++ b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.UnitTests/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.UnitTests.csproj
@@ -11,8 +11,8 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Hl7.Fhir.STU3" Version="4.2.1" />
-    <PackageReference Include="Hl7.FhirPath" Version="4.2.1" />
+    <PackageReference Include="Hl7.Fhir.STU3" Version="5.0.0" />
+	<PackageReference Include="Hl7.Fhir.Base" Version="5.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
     <PackageReference Include="xunit" Version="2.4.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0">
diff --git a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.Core/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.csproj b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.Core/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.csproj
index 1660254b..f705724f 100644
--- a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.Core/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.csproj
+++ b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.Core/Microsoft.Health.Fhir.Anonymizer.Stu3.Core.csproj
@@ -10,8 +10,8 @@
 
   <ItemGroup>
     <PackageReference Include="Ensure.That" Version="9.2.0" />
-    <PackageReference Include="Hl7.Fhir.STU3" Version="4.2.1" />
-    <PackageReference Include="Hl7.FhirPath" Version="4.2.1" />
+    <PackageReference Include="Hl7.Fhir.STU3" Version="5.0.0" />
+	<PackageReference Include="Hl7.Fhir.Base" Version="5.0.0" />
     <PackageReference Include="MathNet.Numerics" Version="4.11.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="3.1.2" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
diff --git a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.FunctionalTests/Microsoft.Health.Fhir.Anonymizer.Stu3.FunctionalTests.csproj b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.FunctionalTests/Microsoft.Health.Fhir.Anonymizer.Stu3.FunctionalTests.csproj
index b5c5413f..a12b2eb0 100644
--- a/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.FunctionalTests/Microsoft.Health.Fhir.Anonymizer.Stu3.FunctionalTests.csproj
+++ b/FHIR/src/Microsoft.Health.Fhir.Anonymizer.Stu3.FunctionalTests/Microsoft.Health.Fhir.Anonymizer.Stu3.FunctionalTests.csproj
@@ -11,8 +11,8 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Hl7.Fhir.STU3" Version="4.2.1" />
-    <PackageReference Include="Hl7.FhirPath" Version="4.2.1" />
+    <PackageReference Include="Hl7.Fhir.STU3" Version="5.0.0" />
+	<PackageReference Include="Hl7.Fhir.Base" Version="5.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
     <PackageReference Include="xunit" Version="2.4.0" />