diff --git a/src/Smdn.Devices.BP35XX/Smdn.Devices.BP35XX.csproj b/src/Smdn.Devices.BP35XX/Smdn.Devices.BP35XX.csproj
index 2551c0f..2a9f06e 100644
--- a/src/Smdn.Devices.BP35XX/Smdn.Devices.BP35XX.csproj
+++ b/src/Smdn.Devices.BP35XX/Smdn.Devices.BP35XX.csproj
@@ -7,7 +7,7 @@ SPDX-License-Identifier: MIT
     <TargetFrameworks>net8.0;net6.0;netstandard2.1</TargetFrameworks>
     <VersionPrefix>1.0.0</VersionPrefix>
     <VersionSuffix></VersionSuffix>
-    <!-- <PackageValidationBaselineVersion>1.0.0</PackageValidationBaselineVersion> -->
+    <PackageValidationBaselineVersion>1.0.0</PackageValidationBaselineVersion>
     <Nullable>enable</Nullable>
     <RootNamespace/> <!-- empty the root namespace so that the namespace is determined only by the directory name, for code style rule IDE0030 -->
     <NoWarn>CS1591;$(NoWarn)</NoWarn> <!-- CS1591: Missing XML comment for publicly visible type or member 'Type_or_Member' -->
diff --git a/src/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP.csproj b/src/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP.csproj
index d5dcff3..7997e89 100644
--- a/src/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP.csproj
+++ b/src/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP.csproj
@@ -7,7 +7,7 @@ SPDX-License-Identifier: MIT
     <TargetFrameworks>net8.0;net6.0;netstandard2.1</TargetFrameworks>
     <VersionPrefix>1.0.1</VersionPrefix>
     <VersionSuffix></VersionSuffix>
-    <!-- <PackageValidationBaselineVersion>1.0.0</PackageValidationBaselineVersion> -->
+    <PackageValidationBaselineVersion>1.0.0</PackageValidationBaselineVersion>
     <Nullable>enable</Nullable>
     <RootNamespace/> <!-- empty the root namespace so that the namespace is determined only by the directory name, for code style rule IDE0030 -->
     <NoWarn>CA1848;$(NoWarn)</NoWarn> <!-- CA1848: For improved performance, use the LoggerMessage delegates instead of calling 'LoggerExtensions.LogXxxxx(...)' -->