diff --git a/appveyor.yml b/appveyor.yml
index 9b84f0dd8..5f9669a3b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -29,7 +29,10 @@ build:
   project: src/Markdig.sln
   verbosity: minimal
 before_package:
-- cmd: msbuild /t:pack /p:VersionSuffix="%MARKDIG_VERSION_SUFFIX%" /p:Configuration=Release Markdig/Markdig.csproj
+- cmd: >-
+     msbuild /t:pack /p:VersionSuffix="%MARKDIG_VERSION_SUFFIX%" /p:Configuration=Release Markdig/Markdig.csproj
+     msbuild /t:Clean Markdig/Markdig.csproj
+     msbuild /t:pack /p:VersionSuffix="%MARKDIG_VERSION_SUFFIX%" /p:Configuration=Release;SignAssembly=true Markdig/Markdig.csproj
 artifacts:
 - path: src\Markdig\Bin\Release\*.nupkg
   name: Markdig Nugets
diff --git a/src/Markdig/Markdig.csproj b/src/Markdig/Markdig.csproj
index aac0b6ff2..6ed251249 100644
--- a/src/Markdig/Markdig.csproj
+++ b/src/Markdig/Markdig.csproj
@@ -10,6 +10,7 @@
     <TargetFrameworks>net35;net40;portable40-net40+sl5+win8+wp8+wpa81;netstandard1.1</TargetFrameworks>
     <AssemblyName>Markdig</AssemblyName>
     <PackageId>Markdig</PackageId>
+    <PackageId Condition="'$(SignAssembly)' == 'true'">Markdig.Signed</PackageId>
     <PackageTags>Markdown CommonMark md html md2html</PackageTags>
     <PackageReleaseNotes>
       &gt; 0.12.4
@@ -65,4 +66,8 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>
 
+  <PropertyGroup Condition=" '$(SignAssembly)' == 'true' ">
+    <AssemblyOriginatorKeyFile>key.snk</AssemblyOriginatorKeyFile>
+    <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
+  </PropertyGroup>  
 </Project>
diff --git a/src/Markdig/key.snk b/src/Markdig/key.snk
new file mode 100644
index 000000000..4c6c9aa78
Binary files /dev/null and b/src/Markdig/key.snk differ
diff --git a/src/markdig.sln b/src/markdig.sln
index 72d167dc8..69cd9e0e8 100644
--- a/src/markdig.sln
+++ b/src/markdig.sln
@@ -1,10 +1,11 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.26403.7
+VisualStudioVersion = 15.0.26430.16
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Build", "Build", "{061866E2-005C-4D13-A338-EA464BBEC60F}"
 	ProjectSection(SolutionItems) = preProject
+		..\appveyor.yml = ..\appveyor.yml
 		..\license.txt = ..\license.txt
 		..\readme.md = ..\readme.md
 	EndProjectSection