diff --git a/bench/bench.csproj b/bench/bench.csproj
index b8ea385..c5a530c 100644
--- a/bench/bench.csproj
+++ b/bench/bench.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
diff --git a/src/reader/MsgPackReader.IDeserializeType.cs b/src/reader/MsgPackReader.IDeserializeType.cs
index d261d89..9242f35 100644
--- a/src/reader/MsgPackReader.IDeserializeType.cs
+++ b/src/reader/MsgPackReader.IDeserializeType.cs
@@ -13,61 +13,32 @@ private struct DeserializeType(MsgPackReader<TReader> deserializer) : IDeseriali
 
         char IDeserializeType.ReadChar(int index) => (char)deserializer.ReadU16();
 
-        decimal IDeserializeType.ReadDecimal(int index)
-        {
-            throw new NotImplementedException();
-        }
+        decimal IDeserializeType.ReadDecimal(int index) => deserializer.ReadDecimal();
+        double IDeserializeType.ReadDouble(int index) => deserializer.ReadDouble();
 
-        double IDeserializeType.ReadDouble(int index)
-        {
-            throw new NotImplementedException();
-        }
+        float IDeserializeType.ReadFloat(int index) => deserializer.ReadFloat();
 
-        float IDeserializeType.ReadFloat(int index)
-        {
-            throw new NotImplementedException();
-        }
-
-        short IDeserializeType.ReadI16(int index)
-        {
-            throw new NotImplementedException();
-        }
+        short IDeserializeType.ReadI16(int index) => deserializer.ReadI16();
 
         int IDeserializeType.ReadI32(int index) => deserializer.ReadI32();
 
         long IDeserializeType.ReadI64(int index) => deserializer.ReadI64();
 
-        sbyte IDeserializeType.ReadSByte(int index)
-        {
-            throw new NotImplementedException();
-        }
+        sbyte IDeserializeType.ReadSByte(int index) => deserializer.ReadSByte();
 
         string IDeserializeType.ReadString(int index) => deserializer.ReadString();
 
-        ushort IDeserializeType.ReadU16(int index)
-        {
-            throw new NotImplementedException();
-        }
+        ushort IDeserializeType.ReadU16(int index) => deserializer.ReadU16();
 
-        uint IDeserializeType.ReadU32(int index)
-        {
-            throw new NotImplementedException();
-        }
+        uint IDeserializeType.ReadU32(int index) => deserializer.ReadU32();
 
-        ulong IDeserializeType.ReadU64(int index)
-        {
-            throw new NotImplementedException();
-        }
+        ulong IDeserializeType.ReadU64(int index) => deserializer.ReadU64();
 
         T IDeserializeType.ReadValue<T>(int index, Serde.IDeserialize<T> deserialize)
-        {
-            throw new NotImplementedException();
-        }
+             => deserialize.Deserialize(deserializer);
 
         void IDeserializeType.SkipValue()
-        {
-            throw new NotImplementedException();
-        }
+            => throw new NotImplementedException();
 
         int IDeserializeType.TryReadIndex(ISerdeInfo map, out string? errorName)
         {
diff --git a/src/reader/MsgPackReader.cs b/src/reader/MsgPackReader.cs
index 277afb1..d14bda5 100644
--- a/src/reader/MsgPackReader.cs
+++ b/src/reader/MsgPackReader.cs
@@ -170,7 +170,7 @@ IDeserializeCollection IDeserializer.ReadCollection(ISerdeInfo typeInfo)
         }
     }
 
-    decimal IDeserializer.ReadDecimal()
+    public decimal ReadDecimal()
     {
         throw new NotImplementedException();
     }
@@ -250,7 +250,7 @@ private bool TryReadI16(out short i16)
         return false;
     }
 
-    short IDeserializer.ReadI16()
+    public short ReadI16()
     {
         if (!TryReadI16(out var i16))
         {
@@ -335,7 +335,7 @@ private long ReadI64()
         return proxy.Deserialize(this);
     }
 
-    sbyte IDeserializer.ReadSByte()
+    public sbyte ReadSByte()
     {
         if (!TryReadSbyte(out var sb))
         {
@@ -490,7 +490,7 @@ private bool TryReadU64(out ulong u64)
         return false;
     }
 
-    uint IDeserializer.ReadU32()
+    public uint ReadU32()
     {
         if (!TryReadU32(out var u32))
         {
@@ -499,7 +499,7 @@ uint IDeserializer.ReadU32()
         return u32;
     }
 
-    ulong IDeserializer.ReadU64()
+    public ulong ReadU64()
     {
         if (!TryReadU64(out var u64))
         {
diff --git a/tests/Serde.MsgPack.Tests.csproj b/tests/Serde.MsgPack.Tests.csproj
index 5103982..250e0ed 100644
--- a/tests/Serde.MsgPack.Tests.csproj
+++ b/tests/Serde.MsgPack.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>