diff --git a/node_modules/gfm/showdown.js b/node_modules/gfm/showdown.js
index 498bb8ed..324b81db 100644
--- a/node_modules/gfm/showdown.js
+++ b/node_modules/gfm/showdown.js
@@ -68,6 +68,13 @@
 // Modifications are tagged with "GFM"
 // **************************************************
 
+// ==================================================
+// CommonJS modifications by benblank
+// http://www.commonjs.org/specs/modules/1.0/
+//
+// Modifications are tagged with "CJS"
+// ==================================================
+
 //
 // Showdown namespace
 //
@@ -154,6 +161,12 @@ this.makeHtml = function(text) {
 	// attacklab: Restore tildes
 	text = text.replace(/~T/g,"~");
 
+	// == CJS == Create local `GitHub` object for use by GFM
+	var GitHub = this.githubRepoName && this.githubRepoOwner ? {
+		nameWithOwner: this.githubRepoOwner + "/" + this.githubRepoName,
+		repoName: this.githubRepoName
+	} : typeof window !== "undefined" ? window.GitHub : undefined;
+
   // ** GFM **  Auto-link URLs and emails
   text = text.replace(/https?\:\/\/[^"\s\<\>]*[^.,;'">\:\s\<\>\)\]\!]/g, function(wholeMatch,matchIndex){
     var left = text.slice(0, matchIndex), right = text.slice(matchIndex)
@@ -1359,4 +1372,7 @@ var escapeCharacters_callback = function(wholeMatch,m1) {
 	return "~E"+charCodeToEscape+"E";
 }
 
-} // end of Showdown.converter
\ No newline at end of file
+} // end of Showdown.converter
+
+// == CJS == Export the converter
+if (typeof exports !== "undefined") exports.Converter = Showdown.converter;