diff --git a/src/FlexLabs.Util.AspNetCore/FlexLabs.Util.AspNetCore.csproj b/src/FlexLabs.Util.AspNetCore/FlexLabs.Util.AspNetCore.csproj
index 63fa1b2..1bab2df 100644
--- a/src/FlexLabs.Util.AspNetCore/FlexLabs.Util.AspNetCore.csproj
+++ b/src/FlexLabs.Util.AspNetCore/FlexLabs.Util.AspNetCore.csproj
@@ -18,6 +18,9 @@ This is the AspNetMvc part</Description>
     <AssemblyVersion>2.1.0</AssemblyVersion>
     <FileVersion>2.1.0</FileVersion>
     <Version>2.1.0</Version>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
     <SignAssembly>True</SignAssembly>
     <AssemblyOriginatorKeyFile>..\..\..\Keys\FlexLabsStrongKey.pfx</AssemblyOriginatorKeyFile>
     <PostBuildEvent>..\..\..\..\..\..\signtool.exe sign /n "Artiom Chilaru" /t "http://timestamp.digicert.com" FlexLabs.Util.AspNetCore.dll</PostBuildEvent>
diff --git a/src/FlexLabs.Util.Mvc/FlexLabs.Util.Mvc.csproj b/src/FlexLabs.Util.Mvc/FlexLabs.Util.Mvc.csproj
index f1c1bf5..a2c3888 100644
--- a/src/FlexLabs.Util.Mvc/FlexLabs.Util.Mvc.csproj
+++ b/src/FlexLabs.Util.Mvc/FlexLabs.Util.Mvc.csproj
@@ -18,6 +18,9 @@ This is the ASP.NET MVC part</Description>
     <AssemblyVersion>2.1.0</AssemblyVersion>
     <FileVersion>2.1.0</FileVersion>
     <Version>2.1.0</Version>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
     <SignAssembly>True</SignAssembly>
     <AssemblyOriginatorKeyFile>..\..\..\Keys\FlexLabsStrongKey.pfx</AssemblyOriginatorKeyFile>
     <PostBuildEvent>..\..\..\..\..\..\signtool.exe sign /n "Artiom Chilaru" /t "http://timestamp.digicert.com" FlexLabs.Util.Mvc.dll</PostBuildEvent>
diff --git a/src/FlexLabs.Util.Web/FlexLabs.Util.Web.csproj b/src/FlexLabs.Util.Web/FlexLabs.Util.Web.csproj
index 16822ca..a5cc6eb 100644
--- a/src/FlexLabs.Util.Web/FlexLabs.Util.Web.csproj
+++ b/src/FlexLabs.Util.Web/FlexLabs.Util.Web.csproj
@@ -16,6 +16,9 @@
     <AssemblyVersion>2.1.0</AssemblyVersion>
     <FileVersion>2.1.0</FileVersion>
     <Version>2.1.0</Version>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
     <SignAssembly>True</SignAssembly>
     <AssemblyOriginatorKeyFile>..\..\..\Keys\FlexLabsStrongKey.pfx</AssemblyOriginatorKeyFile>
     <PostBuildEvent>..\..\..\..\..\..\signtool.exe sign /n "Artiom Chilaru" /t "http://timestamp.digicert.com" FlexLabs.Util.Web.dll</PostBuildEvent>