diff --git a/Gemfile.lock b/Gemfile.lock
index c4dd930d..41dac82c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -166,6 +166,7 @@ GEM
     nds_api (0.1.23)
     nenv (0.3.0)
     newrelic_rpm (5.3.0.346)
+    nio4r (2.5.8)
     nokogiri (1.10.1)
       mini_portile2 (~> 2.4.0)
     notiffany (0.1.1)
@@ -187,7 +188,8 @@ GEM
     pry-byebug (3.6.0)
       byebug (~> 10.0)
       pry (~> 0.10)
-    puma (3.12.0)
+    puma (5.6.2)
+      nio4r (~> 2.0)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
     rack (1.6.11)