diff --git a/Gemfile.lock b/Gemfile.lock
index 2e05aaf..8923ee8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -143,6 +143,9 @@ GEM
     jekyll-sitemap (1.2.0)
       jekyll (~> 3.3)
     jekyll-swiss (0.4.0)
+    jekyll-target-blank (2.0.0)
+      jekyll (>= 3.0, < 5.0)
+      nokogiri (~> 1.10)
     jekyll-theme-architect (0.1.1)
       jekyll (~> 3.5)
       jekyll-seo-tag (~> 2.0)
@@ -198,20 +201,22 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.6.1)
     minima (2.5.0)
       jekyll (~> 3.5)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.11.3)
     multipart-post (2.0.0)
-    nokogiri (1.8.5)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     octokit (4.13.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
+    racc (1.5.2)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -246,6 +251,7 @@ DEPENDENCIES
   jekyll-feed (~> 0.6)
   jekyll-seo-tag
   jekyll-sitemap
+  jekyll-target-blank
   minima (~> 2.0)
   tzinfo-data