diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/SKIT.FlurlHttpClient.Wechat.Api.csproj b/src/SKIT.FlurlHttpClient.Wechat.Api/SKIT.FlurlHttpClient.Wechat.Api.csproj
index a09dfdb9..53e71dde 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/SKIT.FlurlHttpClient.Wechat.Api.csproj
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/SKIT.FlurlHttpClient.Wechat.Api.csproj
@@ -36,7 +36,7 @@
 	</ItemGroup>
 
 	<ItemGroup>
-        <PackageReference Include="BouncyCastle.Cryptography" Version="2.4.0" />
+        <PackageReference Include="BouncyCastle.Cryptography" Version="2.5.0" />
 		<PackageReference Include="SKIT.FlurlHttpClient.Common" Version="3.1.0" />
 	</ItemGroup>
 
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayBusiness/SKIT.FlurlHttpClient.Wechat.TenpayBusiness.csproj b/src/SKIT.FlurlHttpClient.Wechat.TenpayBusiness/SKIT.FlurlHttpClient.Wechat.TenpayBusiness.csproj
index a6b57e82..a0eb4bd1 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayBusiness/SKIT.FlurlHttpClient.Wechat.TenpayBusiness.csproj
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayBusiness/SKIT.FlurlHttpClient.Wechat.TenpayBusiness.csproj
@@ -36,7 +36,7 @@
 	</ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="BouncyCastle.Cryptography" Version="2.4.0" />
+        <PackageReference Include="BouncyCastle.Cryptography" Version="2.5.0" />
         <PackageReference Include="System.ValueTuple" Version="4.5.0" Condition="'$(TargetFramework)' == 'net462'" />
 		<PackageReference Include="SKIT.FlurlHttpClient.Common" Version="3.1.0" />
     </ItemGroup>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/SKIT.FlurlHttpClient.Wechat.TenpayV3.csproj b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/SKIT.FlurlHttpClient.Wechat.TenpayV3.csproj
index 3043ee09..df7c4853 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/SKIT.FlurlHttpClient.Wechat.TenpayV3.csproj
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/SKIT.FlurlHttpClient.Wechat.TenpayV3.csproj
@@ -36,7 +36,7 @@
 	</ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="BouncyCastle.Cryptography" Version="2.4.0" />
+        <PackageReference Include="BouncyCastle.Cryptography" Version="2.5.0" />
         <PackageReference Include="System.ValueTuple" Version="4.5.0" Condition="'$(TargetFramework)' == 'net462'" />
         <PackageReference Include="SKIT.FlurlHttpClient.Common" Version="3.1.1" />
     </ItemGroup>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/SKIT.FlurlHttpClient.Wechat.Work.csproj b/src/SKIT.FlurlHttpClient.Wechat.Work/SKIT.FlurlHttpClient.Wechat.Work.csproj
index 27245738..7f87a545 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Work/SKIT.FlurlHttpClient.Wechat.Work.csproj
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/SKIT.FlurlHttpClient.Wechat.Work.csproj
@@ -43,7 +43,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="BouncyCastle.Cryptography" Version="2.4.0" />
+        <PackageReference Include="BouncyCastle.Cryptography" Version="2.5.0" />
         <PackageReference Include="SKIT.FlurlHttpClient.Common" Version="3.1.0" />
     </ItemGroup>