diff --git a/src/Serilog/Configuration/LoggerSettingsConfiguration.cs b/src/Serilog/Configuration/LoggerSettingsConfiguration.cs
index 3b40ca44d..ce279f0eb 100644
--- a/src/Serilog/Configuration/LoggerSettingsConfiguration.cs
+++ b/src/Serilog/Configuration/LoggerSettingsConfiguration.cs
@@ -14,7 +14,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Collections.ObjectModel;
 using System.Linq;
 using Serilog.Settings.KeyValuePairs;
 
diff --git a/src/Serilog/Settings/KeyValuePairs/KeyValuePairSettings.cs b/src/Serilog/Settings/KeyValuePairs/KeyValuePairSettings.cs
index 3870b5dea..96d8a8ae5 100644
--- a/src/Serilog/Settings/KeyValuePairs/KeyValuePairSettings.cs
+++ b/src/Serilog/Settings/KeyValuePairs/KeyValuePairSettings.cs
@@ -14,7 +14,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Collections.ObjectModel;
 using System.Linq;
 using System.Reflection;
 using System.Text.RegularExpressions;
@@ -203,7 +202,7 @@ where matchLevelSwitchDeclarations.IsMatch(wt.Key)
                 }
                 namedSwitches.Add(switchName, newSwitch);
             }
-            return new ReadOnlyDictionary<string, LoggingLevelSwitch>(namedSwitches);
+            return namedSwitches;
         }
 
         static LoggingLevelSwitch LookUpSwitchByName(string switchName, IReadOnlyDictionary<string, LoggingLevelSwitch> declaredLevelSwitches)