diff --git a/Gemfile.lock b/Gemfile.lock
index 1a02e54..0755809 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -164,6 +164,7 @@ GEM
     minitest (5.10.2)
     multipart-post (2.0.0)
     net-dns (0.8.0)
+    nio4r (2.5.9)
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     octokit (4.7.0)
@@ -171,7 +172,8 @@ GEM
     pathutil (0.14.0)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
-    puma (3.12.4)
+    puma (5.6.7)
+      nio4r (~> 2.0)
     rack (1.6.12)
     rack-jekyll (0.5.0)
       jekyll (>= 1.3)