diff --git a/Gemfile.lock b/Gemfile.lock
index 7ff85da..a520e6c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -199,6 +199,7 @@ GEM
     mysql2 (0.4.9)
     nested_form (0.3.2)
     net-ssh (3.2.0)
+    nio4r (2.5.8)
     nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
@@ -207,7 +208,8 @@ GEM
       ast (~> 2.2)
     powerpack (0.1.1)
     public_suffix (3.0.1)
-    puma (3.10.0)
+    puma (5.5.1)
+      nio4r (~> 2.0)
     rack (1.6.11)
     rack-test (0.6.3)
       rack (>= 1.0)