diff --git a/LiveQuery/LiveQuery.Test/LiveQuery.Test.csproj b/LiveQuery/LiveQuery.Test/LiveQuery.Test.csproj
index 1915392..e2572b8 100644
--- a/LiveQuery/LiveQuery.Test/LiveQuery.Test.csproj
+++ b/LiveQuery/LiveQuery.Test/LiveQuery.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>
     <ReleaseVersion>0.6.4</ReleaseVersion>
diff --git a/Realtime/Realtime.Test/Realtime.Test.csproj b/Realtime/Realtime.Test/Realtime.Test.csproj
index f72f055..49426a2 100644
--- a/Realtime/Realtime.Test/Realtime.Test.csproj
+++ b/Realtime/Realtime.Test/Realtime.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>
     <ReleaseVersion>0.6.4</ReleaseVersion>
diff --git a/Sample/LiveQueryApp/LiveQueryApp.csproj b/Sample/LiveQueryApp/LiveQueryApp.csproj
index 58a668e..3275758 100644
--- a/Sample/LiveQueryApp/LiveQueryApp.csproj
+++ b/Sample/LiveQueryApp/LiveQueryApp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <ReleaseVersion>0.6.4</ReleaseVersion>
   </PropertyGroup>
 
diff --git a/Sample/RealtimeApp/RealtimeApp.csproj b/Sample/RealtimeApp/RealtimeApp.csproj
index 3dabc64..975b1b4 100644
--- a/Sample/RealtimeApp/RealtimeApp.csproj
+++ b/Sample/RealtimeApp/RealtimeApp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <ReleaseVersion>0.6.4</ReleaseVersion>
   </PropertyGroup>
 
diff --git a/Storage/Storage.Test/Storage.Test.csproj b/Storage/Storage.Test/Storage.Test.csproj
index c0a1aa8..523782b 100644
--- a/Storage/Storage.Test/Storage.Test.csproj
+++ b/Storage/Storage.Test/Storage.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>
     <ReleaseVersion>0.6.4</ReleaseVersion>