diff --git a/Directory.Build.props b/Directory.Build.props
index addf570b..f4208985 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -11,7 +11,7 @@
     <Copyright>2019</Copyright>
     <PackageTags>F#, argument, parser</PackageTags>
     <RepositoryUrl>https://github.com/fsprojects/Argu/</RepositoryUrl>
-    <PackageProjectUrl>http://fsprojects.github.io/Argu/</PackageProjectUrl>
+    <PackageProjectUrl>https://fsprojects.github.io/Argu/</PackageProjectUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <RepositoryType>git</RepositoryType>
     <!-- SourceLink Options -->
@@ -21,4 +21,4 @@
     <!--<IncludeSymbols>true</IncludeSymbols>-->
     <!--<SymbolPackageFormat>snupkg</SymbolPackageFormat>-->
   </PropertyGroup>
-</Project>
\ No newline at end of file
+</Project>