diff --git a/NineChronicles.Headless/GraphTypes/CurrencyInputType.cs b/NineChronicles.Headless/GraphTypes/CurrencyInputType.cs
deleted file mode 100644
index ff9cb22cb..000000000
--- a/NineChronicles.Headless/GraphTypes/CurrencyInputType.cs
+++ /dev/null
@@ -1,43 +0,0 @@
-using System.Collections.Generic;
-using System.Collections.Immutable;
-using System.Linq;
-using GraphQL.Types;
-using Libplanet;
-using Libplanet.Assets;
-using Libplanet.Explorer.GraphTypes;
-
-namespace NineChronicles.Headless.GraphTypes
-{
-    public class CurrencyInputType : InputObjectGraphType<CurrencyType>
-    {
-        public CurrencyInputType()
-        {
-            Field<NonNullGraphType<StringGraphType>>("ticker");
-            Field<NonNullGraphType<ByteGraphType>>("decimalPlaces");
-            Field<ListGraphType<NonNullGraphType<AddressType>>>("minters");
-        }
-
-        public override object ParseDictionary(IDictionary<string, object?> value)
-        {
-            IImmutableSet<Address>? minters = null;
-            if (value.ContainsKey("minters"))
-            {
-                var rawMinters = (object[])value["minters"]!;
-                if (rawMinters.Any())
-                {
-                    minters = ImmutableHashSet<Address>.Empty;
-                    foreach (var rawMinter in rawMinters)
-                    {
-                        minters = minters.Add((Address)rawMinter);
-                    }
-                }
-            }
-#pragma warning disable CS0618
-            // Use of obsolete method Currency.Legacy(): https://github.com/planetarium/lib9c/discussions/1319
-            var currency = Currency.Legacy((string)value["ticker"]!, (byte)value["decimalPlaces"]!, minters: minters);
-#pragma warning restore CS0618
-            return currency;
-        }
-
-    }
-}