diff --git a/src/ConfigurationProcessor.Core/Implementation/StringArgumentValue.cs b/src/ConfigurationProcessor.Core/Implementation/StringArgumentValue.cs
index c0331cd..d34be44 100644
--- a/src/ConfigurationProcessor.Core/Implementation/StringArgumentValue.cs
+++ b/src/ConfigurationProcessor.Core/Implementation/StringArgumentValue.cs
@@ -35,6 +35,11 @@ public StringArgumentValue(IConfigurationSection section, string providedValue)
       {
          var argumentValue = Environment.ExpandEnvironmentVariables(providedValue);
 
+         if (toType == typeof(string))
+         {
+            return providedValue;
+         }
+
          var toTypeInfo = toType.GetTypeInfo();
          if (toTypeInfo.IsGenericType && toType.GetGenericTypeDefinition() == typeof(Nullable<>))
          {