diff --git a/Directory.Build.props b/Directory.Build.props
index 5ec85203..f954c406 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,6 +1,6 @@
 <Project>
     <PropertyGroup>
-        <Lib9cVersion>1.20.1-dev.e639502afb22df4d230d52002b519b3f8ef16b4f</Lib9cVersion>
-        <LibplanetVersion>5.4.2</LibplanetVersion>
+        <Lib9cVersion>1.21.0-dev.fa7c58ff1072e2d81526c4f414c5e54a265f283f</Lib9cVersion>
+        <LibplanetVersion>5.5.0</LibplanetVersion>
     </PropertyGroup>
 </Project>
diff --git a/Lib9c.Models.Tests/Lib9c.Models.Tests.csproj b/Lib9c.Models.Tests/Lib9c.Models.Tests.csproj
index dc23cbb6..27898d19 100644
--- a/Lib9c.Models.Tests/Lib9c.Models.Tests.csproj
+++ b/Lib9c.Models.Tests/Lib9c.Models.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net6.0</TargetFramework>
+        <TargetFramework>net8.0</TargetFramework>
         <LangVersion>10</LangVersion>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
diff --git a/Lib9c.Models/Factories/MailFactory.cs b/Lib9c.Models/Factories/MailFactory.cs
index c7f82acb..6b4039ab 100644
--- a/Lib9c.Models/Factories/MailFactory.cs
+++ b/Lib9c.Models/Factories/MailFactory.cs
@@ -41,6 +41,7 @@ public static Mail Create(IValue bencoded)
             "sellCancel" => new SellCancelMail(d),
             "seller" => new SellerMail(d),
             nameof(UnloadFromMyGaragesRecipientMail) => new UnloadFromMyGaragesRecipientMail(d),
+            nameof(PatrolRewardMail) => new PatrolRewardMail(d),
             _ => throw new UnsupportedArgumentValueException<string>("typeId", typeId),
         };
     }
diff --git a/Lib9c.Models/Mails/PatrolRewardMail.cs b/Lib9c.Models/Mails/PatrolRewardMail.cs
new file mode 100644
index 00000000..c6a11bd0
--- /dev/null
+++ b/Lib9c.Models/Mails/PatrolRewardMail.cs
@@ -0,0 +1,61 @@
+using Bencodex.Types;
+using Lib9c.Models.Exceptions;
+using Lib9c.Models.Extensions;
+using Libplanet.Types.Assets;
+using MongoDB.Bson.Serialization.Attributes;
+using ValueKind = Bencodex.Types.ValueKind;
+
+namespace Lib9c.Models.Mails;
+
+/// <summary>
+/// <see cref="Nekoyume.Model.Mail.PatrolRewardMail"/>
+/// </summary>
+[BsonIgnoreExtraElements]
+public record PatrolRewardMail : Mail
+{
+    public List<FungibleAssetValue> FungibleAssetValues { get; init; }
+    public List<(int id, int count)> Items { get; init; }
+
+    public override IValue Bencoded
+    {
+        get
+        {
+            var d = (Dictionary)base.Bencoded;
+            if (FungibleAssetValues.Count != 0)
+            {
+                d = d.SetItem("f", new List(FungibleAssetValues
+                    .Select(f => f.Serialize())));
+            }
+
+            if (Items.Count != 0)
+            {
+                d = d.SetItem("i", new List(Items
+                    .Select(tuple => List.Empty.Add(tuple.id).Add(tuple.count))));
+            }
+
+            return d;
+        }
+    }
+
+    public PatrolRewardMail(IValue bencoded) : base(bencoded)
+    {
+        if (bencoded is not Dictionary d)
+        {
+            throw new UnsupportedArgumentTypeException<ValueKind>(
+                nameof(bencoded),
+                new[] { ValueKind.Dictionary },
+                bencoded.Kind);
+        }
+
+        FungibleAssetValues = d.ContainsKey("f")
+            ? d["f"].ToList(StateExtensions.ToFungibleAssetValue)
+            : new List<FungibleAssetValue>();
+        Items = d.ContainsKey("i")
+            ? d["i"].ToList<(int, int)>(v =>
+            {
+                var list = (List)v;
+                return ((Integer)list[0], (Integer)list[1]);
+            })
+            : new List<(int id, int count)>();
+    }
+}
diff --git a/Mimir.Worker/Mimir.Worker.csproj b/Mimir.Worker/Mimir.Worker.csproj
index 790a24d0..c80c84fa 100644
--- a/Mimir.Worker/Mimir.Worker.csproj
+++ b/Mimir.Worker/Mimir.Worker.csproj
@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="Lib9c" Version="$(Lib9cVersion)" />
-    <PackageReference Include="Lib9c.Abstractions" Version="$(Lib9cVersion)" />
+    <PackageReference Include="Lib9c.Abstractions" Version="1.20.1-dev.fa7c58ff1072e2d81526c4f414c5e54a265f283f" />
     <PackageReference Include="Libplanet.RocksDBStore" Version="$(LibplanetVersion)" />
     <PackageReference Include="Libplanet" Version="$(LibplanetVersion)" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.0" />