diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9479c74..aeea5e8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,6 +1,6 @@
 name: GreenPipes
 env:
-  GREENPIPES_VERSION: 4.0.1
+  GREENPIPES_VERSION: 4.0.2
   DOTNET_CLI_TELEMETRY_OPTOUT: 1
   DOTNET_SYSTEM_GLOBALIZATION_INVARIANT: true
 on:
diff --git a/src/GreenPipes/Internals/Reflection/ReadOnlyPropertyCache.cs b/src/GreenPipes/Internals/Reflection/ReadOnlyPropertyCache.cs
index aaf3a23..5d0118d 100644
--- a/src/GreenPipes/Internals/Reflection/ReadOnlyPropertyCache.cs
+++ b/src/GreenPipes/Internals/Reflection/ReadOnlyPropertyCache.cs
@@ -51,6 +51,8 @@ static IDictionary<string, ReadOnlyProperty<T>> CreatePropertyCache()
         {
             return new Dictionary<string, ReadOnlyProperty<T>>(typeof(T).GetAllProperties()
                 .Where(x => x.CanRead)
+                .GroupBy(x => x.Name, StringComparer.OrdinalIgnoreCase)
+                .Select(x => x.Last())
                 .Select(x => new ReadOnlyProperty<T>(x))
                 .ToDictionary(x => x.Property.Name));
         }
diff --git a/src/GreenPipes/Internals/Reflection/ReadWritePropertyCache.cs b/src/GreenPipes/Internals/Reflection/ReadWritePropertyCache.cs
index f2658e0..5e5838f 100644
--- a/src/GreenPipes/Internals/Reflection/ReadWritePropertyCache.cs
+++ b/src/GreenPipes/Internals/Reflection/ReadWritePropertyCache.cs
@@ -57,6 +57,8 @@ static IDictionary<string, ReadWriteProperty<T>> CreatePropertyCache(bool includ
             return new Dictionary<string, ReadWriteProperty<T>>(typeof(T).GetAllProperties()
                 .Where(x => x.CanRead && (includeNonPublic || x.CanWrite))
                 .Where(x => x.SetMethod != null)
+                .GroupBy(x => x.Name, StringComparer.OrdinalIgnoreCase)
+                .Select(x => x.Last())
                 .Select(x => new ReadWriteProperty<T>(x))
                 .ToDictionary(x => x.Property.Name));
         }