diff --git a/src/Npgsql/Npgsql.csproj b/src/Npgsql/Npgsql.csproj
index c8d596514a..8552473df4 100644
--- a/src/Npgsql/Npgsql.csproj
+++ b/src/Npgsql/Npgsql.csproj
@@ -30,7 +30,7 @@
 
   <ItemGroup>
     <PackageReference Include="System.ValueTuple" Version="4.3.1" />
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.3.0" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
     <PackageReference Include="Microsoft.ApiDesignGuidelines.Analyzers" Version="1.2.0-beta2" PrivateAssets="All" />
   </ItemGroup>
 
diff --git a/src/VSIX/packages.config b/src/VSIX/packages.config
index d1e03f80c3..0ab1abf09d 100644
--- a/src/VSIX/packages.config
+++ b/src/VSIX/packages.config
@@ -52,7 +52,7 @@
   <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="net452" />
   <package id="System.Threading" version="4.3.0" targetFramework="net452" />
   <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net452" />
-  <package id="System.Threading.Tasks.Extensions" version="4.3.0" targetFramework="net452" />
+  <package id="System.Threading.Tasks.Extensions" version="4.5.4" targetFramework="net452" />
   <package id="System.Threading.Timer" version="4.3.0" targetFramework="net452" />
   <package id="System.Xml.ReaderWriter" version="4.3.0" targetFramework="net452" requireReinstallation="true" />
   <package id="System.Xml.XDocument" version="4.3.0" targetFramework="net452" />