diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53aff6a..72e8386 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,8 @@
-# 0.18.3
+# 1.0.0
 
 - Enabled using `diff:ignoreAttributes` and `diff:ignoreChildren` together on the same element.
 - Corrected list of attributes that is considered as boolean attributes. Removed `hidden`, added `inert`, `playsinline`, `shadowrootclonable`, `shadowrootdelegatesfocus`, and `shadowrootserializable`.
+- Upgrade to v1.x of AngleSharp.
 
 # 0.18.2
 
diff --git a/src/AngleSharp.Diffing/AngleSharp.Diffing.csproj b/src/AngleSharp.Diffing/AngleSharp.Diffing.csproj
index 0594b2d..1c574ff 100644
--- a/src/AngleSharp.Diffing/AngleSharp.Diffing.csproj
+++ b/src/AngleSharp.Diffing/AngleSharp.Diffing.csproj
@@ -21,6 +21,7 @@
 		<PublishRepositoryUrl>true</PublishRepositoryUrl>
 		<IncludeSymbols>true</IncludeSymbols>
 		<SymbolPackageFormat>snupkg</SymbolPackageFormat>
+		<NoWarn>$(NoWarn);NU5104</NoWarn>
 	</PropertyGroup>
 
 	<ItemGroup>
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
index 2004708..bbbcb7b 100644
--- a/src/Directory.Build.props
+++ b/src/Directory.Build.props
@@ -1,6 +1,6 @@
 <Project>
 	<PropertyGroup>
-		<Version>0.18.3</Version>
+		<Version>1.0.0</Version>
 	</PropertyGroup>
 
 	<PropertyGroup>
@@ -20,7 +20,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="AngleSharp" Version="0.17.0" />
-		<PackageReference Include="AngleSharp.Css" Version="0.17.0" />
+		<PackageReference Include="AngleSharp" Version="1.1.2" />
+		<PackageReference Include="AngleSharp.Css" Version="1.0.0-beta.144" />
 	</ItemGroup>
 </Project>
\ No newline at end of file