diff --git a/src/DynamicExpresso.Core/DefaultNumberType.cs b/src/DynamicExpresso.Core/DefaultNumberType.cs
index 062cf12..573a716 100644
--- a/src/DynamicExpresso.Core/DefaultNumberType.cs
+++ b/src/DynamicExpresso.Core/DefaultNumberType.cs
@@ -1,19 +1,15 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
 namespace DynamicExpresso
 {
-    /// <summary>
-    /// Setting the default number types when no suffix is specified
-    /// </summary>
-    public enum DefaultNumberType
-    {
-        Default = 0, //(Int by default or Double if real number)
-        Int = 1,
-        Long = 2,
-        Single = 3,
-        Double = 4,
-        Decimal = 5
-    }
+	/// <summary>
+	/// Setting the default number types when no suffix is specified
+	/// </summary>
+	public enum DefaultNumberType
+	{
+		Default = 0, //(Int by default or Double if real number)
+		Int = 1,
+		Long = 2,
+		Single = 3,
+		Double = 4,
+		Decimal = 5
+	}
 }
diff --git a/src/DynamicExpresso.Core/Exceptions/AssignmentOperatorDisabledException.cs b/src/DynamicExpresso.Core/Exceptions/AssignmentOperatorDisabledException.cs
index 86a68c5..e13fdbe 100644
--- a/src/DynamicExpresso.Core/Exceptions/AssignmentOperatorDisabledException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/AssignmentOperatorDisabledException.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Runtime.Serialization;
-using System.Security.Permissions;
 
 namespace DynamicExpresso.Exceptions
 {
diff --git a/src/DynamicExpresso.Core/Exceptions/DuplicateParameterException.cs b/src/DynamicExpresso.Core/Exceptions/DuplicateParameterException.cs
index ef02071..765545a 100644
--- a/src/DynamicExpresso.Core/Exceptions/DuplicateParameterException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/DuplicateParameterException.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Runtime.Serialization;
-using System.Security.Permissions;
 
 namespace DynamicExpresso.Exceptions
 {
diff --git a/src/DynamicExpresso.Core/Exceptions/NoApplicableMethodException.cs b/src/DynamicExpresso.Core/Exceptions/NoApplicableMethodException.cs
index 7775148..2925542 100644
--- a/src/DynamicExpresso.Core/Exceptions/NoApplicableMethodException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/NoApplicableMethodException.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Runtime.Serialization;
-using System.Security.Permissions;
 
 namespace DynamicExpresso.Exceptions
 {
diff --git a/src/DynamicExpresso.Core/Exceptions/ParseException.cs b/src/DynamicExpresso.Core/Exceptions/ParseException.cs
index f5e699c..2a032eb 100644
--- a/src/DynamicExpresso.Core/Exceptions/ParseException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/ParseException.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Runtime.Serialization;
-using System.Security.Permissions;
 using DynamicExpresso.Resources;
 
 namespace DynamicExpresso.Exceptions
diff --git a/src/DynamicExpresso.Core/Exceptions/ReflectionNotAllowedException.cs b/src/DynamicExpresso.Core/Exceptions/ReflectionNotAllowedException.cs
index 6767693..a8b5508 100644
--- a/src/DynamicExpresso.Core/Exceptions/ReflectionNotAllowedException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/ReflectionNotAllowedException.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Security.Permissions;
 using System.Runtime.Serialization;
 
 namespace DynamicExpresso.Exceptions
diff --git a/src/DynamicExpresso.Core/Exceptions/UnknownIdentifierException.cs b/src/DynamicExpresso.Core/Exceptions/UnknownIdentifierException.cs
index 0045111..dab591f 100644
--- a/src/DynamicExpresso.Core/Exceptions/UnknownIdentifierException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/UnknownIdentifierException.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Runtime.Serialization;
-using System.Security.Permissions;
 
 namespace DynamicExpresso.Exceptions
 {
diff --git a/src/DynamicExpresso.Core/Interpreter.cs b/src/DynamicExpresso.Core/Interpreter.cs
index c4e4daf..d84107f 100644
--- a/src/DynamicExpresso.Core/Interpreter.cs
+++ b/src/DynamicExpresso.Core/Interpreter.cs
@@ -6,7 +6,6 @@
 using System.Linq;
 using System.Linq.Expressions;
 using DynamicExpresso.Exceptions;
-using System.Dynamic;
 
 namespace DynamicExpresso
 {
diff --git a/test/DynamicExpresso.UnitTest/LambdaExpressionTest.cs b/test/DynamicExpresso.UnitTest/LambdaExpressionTest.cs
index 0f86135..f73d8d1 100644
--- a/test/DynamicExpresso.UnitTest/LambdaExpressionTest.cs
+++ b/test/DynamicExpresso.UnitTest/LambdaExpressionTest.cs
@@ -3,7 +3,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Linq.Expressions;
 
 namespace DynamicExpresso.UnitTest
 {