diff --git a/src/DotNetty.Buffers/DotNetty.Buffers.csproj b/src/DotNetty.Buffers/DotNetty.Buffers.csproj
index 389e21710..89c2e5dab 100644
--- a/src/DotNetty.Buffers/DotNetty.Buffers.csproj
+++ b/src/DotNetty.Buffers/DotNetty.Buffers.csproj
@@ -38,6 +38,6 @@
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.0-preview2-26406-04" />
+    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.0" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/DotNetty.Codecs.Http/DotNetty.Codecs.Http.csproj b/src/DotNetty.Codecs.Http/DotNetty.Codecs.Http.csproj
index 92fa74bd8..4f11a99b4 100644
--- a/src/DotNetty.Codecs.Http/DotNetty.Codecs.Http.csproj
+++ b/src/DotNetty.Codecs.Http/DotNetty.Codecs.Http.csproj
@@ -29,7 +29,7 @@
     <Compile Include="..\shared\SharedAssemblyInfo.cs" Link="Properties\SharedAssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.0-preview2-26406-04" />
+    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\DotNetty.Common\DotNetty.Common.csproj" />
diff --git a/src/DotNetty.Codecs/DotNetty.Codecs.csproj b/src/DotNetty.Codecs/DotNetty.Codecs.csproj
index 35e79d6c7..374058681 100644
--- a/src/DotNetty.Codecs/DotNetty.Codecs.csproj
+++ b/src/DotNetty.Codecs/DotNetty.Codecs.csproj
@@ -45,6 +45,6 @@
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.0-preview2-26406-04" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.0" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/DotNetty.Common/DotNetty.Common.csproj b/src/DotNetty.Common/DotNetty.Common.csproj
index 48aa5b84e..e69775dcf 100644
--- a/src/DotNetty.Common/DotNetty.Common.csproj
+++ b/src/DotNetty.Common/DotNetty.Common.csproj
@@ -30,8 +30,8 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Logging" Version="1.1.1" />
-    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.0-preview2-26406-04" />
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.0-preview2-26406-04" />
+    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.0" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.0" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
     <PackageReference Include="System.Diagnostics.Contracts" Version="4.3.0" />
diff --git a/src/DotNetty.Handlers/DotNetty.Handlers.csproj b/src/DotNetty.Handlers/DotNetty.Handlers.csproj
index 4f14e8361..65ca665a8 100644
--- a/src/DotNetty.Handlers/DotNetty.Handlers.csproj
+++ b/src/DotNetty.Handlers/DotNetty.Handlers.csproj
@@ -43,6 +43,6 @@
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.0-preview2-26406-04" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.0" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/DotNetty.Transport/DotNetty.Transport.csproj b/src/DotNetty.Transport/DotNetty.Transport.csproj
index e9ef2bf15..1627a4ddd 100644
--- a/src/DotNetty.Transport/DotNetty.Transport.csproj
+++ b/src/DotNetty.Transport/DotNetty.Transport.csproj
@@ -44,6 +44,6 @@
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.0-preview2-26406-04" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.0" />
   </ItemGroup>
 </Project>
\ No newline at end of file