diff --git a/src/IDeepCloneable.Generator.Source/IDeepCloneable.Generator.Source.csproj b/src/IDeepCloneable.Generator.Source/IDeepCloneable.Generator.Source.csproj
index 8c66598..320ecc8 100644
--- a/src/IDeepCloneable.Generator.Source/IDeepCloneable.Generator.Source.csproj
+++ b/src/IDeepCloneable.Generator.Source/IDeepCloneable.Generator.Source.csproj
@@ -9,7 +9,7 @@
   <ItemGroup>
     <PackageReference Include="lint4sg" Version="0.1.6" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.4.0" />
-    <PackageReference Include="Polyfill" Version="10.3.0" Condition="!Exists('packages.config')">
+    <PackageReference Include="Polyfill" Version="10.5.1" Condition="!Exists('packages.config')">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
diff --git a/src/IDeepCloneable.Generator.Source/packages.lock.json b/src/IDeepCloneable.Generator.Source/packages.lock.json
index 61b4902..633572a 100644
--- a/src/IDeepCloneable.Generator.Source/packages.lock.json
+++ b/src/IDeepCloneable.Generator.Source/packages.lock.json
@@ -34,15 +34,15 @@
       },
       "Polyfill": {
         "type": "Direct",
-        "requested": "[10.3.0, )",
-        "resolved": "10.3.0",
-        "contentHash": "5GDzIb+7qvrftxO+POQc2HAInFnQIw2NKdxjqmAVJ7l+P10djdmKW6dcjnHitUX59TTQZ/Ok0qcHUSasl/Cs1A=="
+        "requested": "[10.5.1, )",
+        "resolved": "10.5.1",
+        "contentHash": "DF5KHoVwE0496LDadwin55TLKtmwCXlCAxpFUYkXudIe9iJq09Dlbilxr46T0uP1g9RWHRwy1MPeKIa7b4WirA=="
       },
       "SonarAnalyzer.CSharp": {
         "type": "Direct",
         "requested": "[10.*, )",
-        "resolved": "10.23.0.137933",
-        "contentHash": "K8CwUkB4PlUcMfLqGCj1aviVfW9AufZH2K/TjgPGYdj4gosV/kcyxpBR0jaCG8argC6dfxJBbSS6xXJ59lFWgA=="
+        "resolved": "10.25.0.139117",
+        "contentHash": "2iBZIkcgsaUNyIPFqR9ECv5PLbAwV9I/v/PeEiMdkfhWEAnqD7VyNXzukQDlL/D24f5OoUc4MbWF5SgYI7x3CA=="
       },
       "Microsoft.CodeAnalysis.Analyzers": {
         "type": "Transitive",
diff --git a/src/IDeepCloneable.Generator/IDeepCloneable.Generator.csproj b/src/IDeepCloneable.Generator/IDeepCloneable.Generator.csproj
index e852b76..1b37031 100644
--- a/src/IDeepCloneable.Generator/IDeepCloneable.Generator.csproj
+++ b/src/IDeepCloneable.Generator/IDeepCloneable.Generator.csproj
@@ -28,7 +28,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Polyfill" Version="10.3.0" Condition="!Exists('packages.config')">
+    <PackageReference Include="Polyfill" Version="10.5.1" Condition="!Exists('packages.config')">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
diff --git a/src/IDeepCloneable.Generator/packages.lock.json b/src/IDeepCloneable.Generator/packages.lock.json
index fd7e588..0b98947 100644
--- a/src/IDeepCloneable.Generator/packages.lock.json
+++ b/src/IDeepCloneable.Generator/packages.lock.json
@@ -40,15 +40,15 @@
       },
       "Polyfill": {
         "type": "Direct",
-        "requested": "[10.3.0, )",
-        "resolved": "10.3.0",
-        "contentHash": "5GDzIb+7qvrftxO+POQc2HAInFnQIw2NKdxjqmAVJ7l+P10djdmKW6dcjnHitUX59TTQZ/Ok0qcHUSasl/Cs1A=="
+        "requested": "[10.5.1, )",
+        "resolved": "10.5.1",
+        "contentHash": "DF5KHoVwE0496LDadwin55TLKtmwCXlCAxpFUYkXudIe9iJq09Dlbilxr46T0uP1g9RWHRwy1MPeKIa7b4WirA=="
       },
       "SonarAnalyzer.CSharp": {
         "type": "Direct",
         "requested": "[10.*, )",
-        "resolved": "10.23.0.137933",
-        "contentHash": "K8CwUkB4PlUcMfLqGCj1aviVfW9AufZH2K/TjgPGYdj4gosV/kcyxpBR0jaCG8argC6dfxJBbSS6xXJ59lFWgA=="
+        "resolved": "10.25.0.139117",
+        "contentHash": "2iBZIkcgsaUNyIPFqR9ECv5PLbAwV9I/v/PeEiMdkfhWEAnqD7VyNXzukQDlL/D24f5OoUc4MbWF5SgYI7x3CA=="
       },
       "Microsoft.CodeAnalysis.Common": {
         "type": "Transitive",