diff --git a/Bve5_Parsing/Bve5_Parsing.csproj b/Bve5_Parsing/Bve5_Parsing.csproj
index a4b4b089..c0e9e97f 100644
--- a/Bve5_Parsing/Bve5_Parsing.csproj
+++ b/Bve5_Parsing/Bve5_Parsing.csproj
@@ -66,7 +66,7 @@ Bve5.7構文のパーサライブラリです。</Description>
       <Version>4.3.0</Version>
     </PackageReference>
     <PackageReference Include="System.Text.Encoding.CodePages">
-      <Version>4.5.1</Version>
+      <Version>9.0.0</Version>
     </PackageReference>
   </ItemGroup>