diff --git a/src/FileCache.Signed/FileCache.Signed.csproj b/src/FileCache.Signed/FileCache.Signed.csproj
index 3316508..7c3c442 100644
--- a/src/FileCache.Signed/FileCache.Signed.csproj
+++ b/src/FileCache.Signed/FileCache.Signed.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net40;net45;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>net40;net45;net48;netstandard2.0;netstandard2.1</TargetFrameworks>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageTags>cache objectcache System.Runtime.Caching.ObjectCache</PackageTags>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
@@ -50,7 +50,13 @@
   <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">
     <Reference Include="System.Runtime.Caching" />
   </ItemGroup>
+  <ItemGroup Condition=" '$(TargetFramework)' == 'net48' ">
+    <Reference Include="System.Runtime.Caching" />
+  </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
     <PackageReference Include="System.Runtime.Caching" Version="4.5.0" />
   </ItemGroup>
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.1' ">
+    <PackageReference Include="System.Runtime.Caching" Version="4.7.0" />
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/FileCache/FileCache.csproj b/src/FileCache/FileCache.csproj
index f184cee..e63a6ad 100644
--- a/src/FileCache/FileCache.csproj
+++ b/src/FileCache/FileCache.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net40;net45;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>net40;net45;net48;netstandard2.0;netstandard2.1</TargetFrameworks>
 	  <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageTags>cache objectcache System.Runtime.Caching.ObjectCache</PackageTags>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
@@ -40,7 +40,13 @@
   <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">
     <Reference Include="System.Runtime.Caching" />
   </ItemGroup>
+  <ItemGroup Condition=" '$(TargetFramework)' == 'net48' ">
+    <Reference Include="System.Runtime.Caching" />
+  </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
     <PackageReference Include="System.Runtime.Caching" Version="4.5.0" />
   </ItemGroup>
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.1' ">
+    <PackageReference Include="System.Runtime.Caching" Version="4.7.0" />
+  </ItemGroup>
 </Project>
\ No newline at end of file