diff --git a/ClosedXML/ClosedXML.csproj b/ClosedXML/ClosedXML.csproj
index 4682fba..8c12cc2 100644
--- a/ClosedXML/ClosedXML.csproj
+++ b/ClosedXML/ClosedXML.csproj
@@ -10,10 +10,11 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>ClosedXML</RootNamespace>
     <AssemblyName>ClosedXML</AssemblyName>
-    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
+    <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/ClosedXML/Excel/Cells/XLCell.cs b/ClosedXML/Excel/Cells/XLCell.cs
index 3282441..2029f97 100644
--- a/ClosedXML/Excel/Cells/XLCell.cs
+++ b/ClosedXML/Excel/Cells/XLCell.cs
@@ -647,7 +647,7 @@
                             foreach (var mi in members)
                             {
                                 if (mi.MemberType == MemberTypes.Property && (mi as PropertyInfo).GetGetMethod().IsStatic)
-                                    _worksheet.SetValue((mi as PropertyInfo).GetValue(null), ro, co);
+                                    _worksheet.SetValue((mi as PropertyInfo).GetValue(null, null), ro, co);
                                 else if (mi.MemberType == MemberTypes.Field && (mi as FieldInfo).IsStatic)
                                     _worksheet.SetValue((mi as FieldInfo).GetValue(null), ro, co);
                                 else
@@ -842,7 +842,7 @@
                         foreach (var mi in members)
                         {
                             if (mi.MemberType == MemberTypes.Property && (mi as PropertyInfo).GetGetMethod().IsStatic)
-                                _worksheet.SetValue((mi as PropertyInfo).GetValue(null), rowNumber, columnNumber);
+                                _worksheet.SetValue((mi as PropertyInfo).GetValue(null, null), rowNumber, columnNumber);
                             else if (mi.MemberType == MemberTypes.Field && (mi as FieldInfo).IsStatic)
                                 _worksheet.SetValue((mi as FieldInfo).GetValue(null), rowNumber, columnNumber);
                             else
diff --git a/ClosedXML_Examples/ClosedXML_Examples.csproj b/ClosedXML_Examples/ClosedXML_Examples.csproj
index b0bc2fb..9f51673 100644
--- a/ClosedXML_Examples/ClosedXML_Examples.csproj
+++ b/ClosedXML_Examples/ClosedXML_Examples.csproj
@@ -10,7 +10,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>ClosedXML_Examples</RootNamespace>
     <AssemblyName>ClosedXML_Examples</AssemblyName>
-    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <TargetFrameworkProfile>
     </TargetFrameworkProfile>
     <FileAlignment>512</FileAlignment>
diff --git a/ClosedXML_Examples/app.config b/ClosedXML_Examples/app.config
index af399dd..21ac8f3 100644
--- a/ClosedXML_Examples/app.config
+++ b/ClosedXML_Examples/app.config
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <configuration>
   <startup>
-    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2"/>
+    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
   </startup>
 </configuration>
diff --git a/ClosedXML_Sandbox/ClosedXML_Sandbox.csproj b/ClosedXML_Sandbox/ClosedXML_Sandbox.csproj
index fa38f46..7566bbf 100644
--- a/ClosedXML_Sandbox/ClosedXML_Sandbox.csproj
+++ b/ClosedXML_Sandbox/ClosedXML_Sandbox.csproj
@@ -10,10 +10,11 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>ClosedXML_Sandbox</RootNamespace>
     <AssemblyName>ClosedXML_Sandbox</AssemblyName>
-    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
+    <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|AnyCPU'">
     <DebugSymbols>true</DebugSymbols>
diff --git a/ClosedXML_Sandbox/PerformanceRunner.cs b/ClosedXML_Sandbox/PerformanceRunner.cs
index ec834ce..d64e02b 100644
--- a/ClosedXML_Sandbox/PerformanceRunner.cs
+++ b/ClosedXML_Sandbox/PerformanceRunner.cs
@@ -91,7 +91,7 @@
             }
             foreach (var str in strings)
             {
-                str.SetValue(row, tmpString.ToString());
+                str.SetValue(row, tmpString.ToString(), null);
             }
 
             // Format decimals
@@ -99,7 +99,7 @@
 
             foreach (var dec in decimals)
             {
-                dec.SetValue(row, tmpDec);
+                dec.SetValue(row, tmpDec, null);
             }
 
             // Format ints
@@ -107,7 +107,7 @@
 
             foreach (var intValue in ints)
             {
-                intValue.SetValue(row, tmpInt);
+                intValue.SetValue(row, tmpInt, null);
             }
 
             // Format dates
@@ -115,7 +115,7 @@
             tmpDate = tmpDate.AddSeconds(rnd.Next(-10000, 100000));
             foreach (var dt in dates)
             {
-                dt.SetValue(row, tmpDate);
+                dt.SetValue(row, tmpDate, null);
             }
 
             // Format timespans
@@ -123,14 +123,14 @@
 
             foreach (var ts in timeSpans)
             {
-                ts.SetValue(row, tmpTimespan);
+                ts.SetValue(row, tmpTimespan, null);
             }
 
             // Format booleans
             var tmpBool = (rnd.Next(0, 2) > 0);
             foreach (var bl in booleans)
             {
-                bl.SetValue(row, tmpBool);
+                bl.SetValue(row, tmpBool, null);
             }
 
             return row;
diff --git a/ClosedXML_Sandbox/app.config b/ClosedXML_Sandbox/app.config
index af399dd..21ac8f3 100644
--- a/ClosedXML_Sandbox/app.config
+++ b/ClosedXML_Sandbox/app.config
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <configuration>
   <startup>
-    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2"/>
+    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
   </startup>
 </configuration>