diff --git a/CarbonQueryDatabase_Adapter/CarbonQueryDatabase_Adapter.csproj b/CarbonQueryDatabase_Adapter/CarbonQueryDatabase_Adapter.csproj
index 6175b53..85f065f 100644
--- a/CarbonQueryDatabase_Adapter/CarbonQueryDatabase_Adapter.csproj
+++ b/CarbonQueryDatabase_Adapter/CarbonQueryDatabase_Adapter.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>BH.Adapter.CarbonQueryDatabase</RootNamespace>
     <AssemblyName>CarbonQueryDatabase_Adapter</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <Deterministic>true</Deterministic>
     <TargetFrameworkProfile />
diff --git a/CarbonQueryDatabase_Engine/CarbonQueryDatabase_Engine.csproj b/CarbonQueryDatabase_Engine/CarbonQueryDatabase_Engine.csproj
index 04f13a6..a728edd 100644
--- a/CarbonQueryDatabase_Engine/CarbonQueryDatabase_Engine.csproj
+++ b/CarbonQueryDatabase_Engine/CarbonQueryDatabase_Engine.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>BH.Engine.Adapters.CarbonQueryDatabase</RootNamespace>
     <AssemblyName>CarbonQueryDatabase_Engine</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
   </PropertyGroup>
diff --git a/CarbonQueryDatabase_oM/CarbonQueryDatabase_oM.csproj b/CarbonQueryDatabase_oM/CarbonQueryDatabase_oM.csproj
index 18b359f..ff46be6 100644
--- a/CarbonQueryDatabase_oM/CarbonQueryDatabase_oM.csproj
+++ b/CarbonQueryDatabase_oM/CarbonQueryDatabase_oM.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>BH.oM.Adapters.CarbonQueryDatabase</RootNamespace>
     <AssemblyName>CarbonQueryDatabase_oM</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
   </PropertyGroup>