diff --git a/html/dochead.html b/html/dochead.html
index f2c8a6ba..e2f0e83d 100644
--- a/html/dochead.html
+++ b/html/dochead.html
@@ -3,6 +3,7 @@
   <title>@NAME@</title>
   <meta http-equiv="content-type" value="text/html;utf-8">
   <link rel="stylesheet" type="text/css" href="../../static/style.css">
+  <link rel="canonical" href="https://www.npmjs.org/@URL@">
   <script async=true src="../../static/toc.js"></script>
 
   <body>
diff --git a/scripts/doc-build.sh b/scripts/doc-build.sh
index 849ffce3..cd8d4fa7 100755
--- a/scripts/doc-build.sh
+++ b/scripts/doc-build.sh
@@ -53,11 +53,13 @@ case $dest in
     exit $?
     ;;
   *.html)
+    url=${dest/html\//}
     (cat html/dochead.html && \
      ./node_modules/.bin/ronn -f $src &&
      cat html/docfoot.html)\
     | sed "s|@NAME@|$name|g" \
     | sed "s|@DATE@|$date|g" \
+    | sed "s|@URL@|$url|g" \
     | sed "s|@VERSION@|$version|g" \
     | perl -pi -e 's/<h1>([^\(]*\([0-9]\)) -- (.*?)<\/h1>/<h1>\1<\/h1> <p>\2<\/p>/g' \
     | perl -pi -e 's/npm-npm/npm/g' \
