diff --git a/src/core/render/index.js b/src/core/render/index.js
index fae1bc52..1c0373c6 100644
--- a/src/core/render/index.js
+++ b/src/core/render/index.js
@@ -226,7 +226,7 @@ export function initRender(vm) {
 
   if (el) {
     if (config.repo) {
-      html += tpl.corner(config.repo)
+      html += tpl.corner(config.repo, config.externalLinkTarget)
     }
     if (config.coverpage) {
       html += tpl.cover()
diff --git a/src/core/render/tpl.js b/src/core/render/tpl.js
index 71f56523..7831e860 100644
--- a/src/core/render/tpl.js
+++ b/src/core/render/tpl.js
@@ -4,7 +4,7 @@ import {isMobile} from '../util/env'
  * @param  {Object} data
  * @return {String}
  */
-export function corner(data) {
+export function corner(data, externalLinkTarget) {
   if (!data) {
     return ''
   }
@@ -14,7 +14,7 @@ export function corner(data) {
   data = data.replace(/^git\+/, '')
 
   return (
-    `<a href="${data}" class="github-corner" aria-label="View source on Github">` +
+    `<a href="${data}" target="${externalLinkTarget}" class="github-corner" aria-label="View source on Github">` +
     '<svg viewBox="0 0 250 250" aria-hidden="true">' +
     '<path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path>' +
     '<path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path>' +