diff --git a/Gemfile.lock b/Gemfile.lock
index 82ea74b..adb7b40 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -25,15 +25,6 @@ GIT
   specs:
     state_machine (1.2.0)
 
-GIT
-  remote: https://github.com/deees/puma-plugin-systemd.git
-  revision: e3b7fc94041c8b437866bbda7880ac09a3dcd229
-  branch: puma-4
-  specs:
-    puma-plugin-systemd (0.1.1)
-      json
-      puma (>= 3.6)
-
 GIT
   remote: https://github.com/gregbell/active_admin.git
   revision: e84c6e541db5ec95ee50455015ca8644a1240b47
@@ -387,7 +378,7 @@ GEM
     mimemagic (0.3.5)
     mini_magick (4.11.0)
     mini_mime (1.0.2)
-    mini_portile2 (2.5.0)
+    mini_portile2 (2.8.0)
     mini_racer (0.3.1)
       libv8 (~> 8.4.255)
     minitest (5.14.3)
@@ -403,8 +394,8 @@ GEM
       net-ssh (>= 2.6.5, < 7.0.0)
     net-ssh (6.1.0)
     nio4r (2.5.4)
-    nokogiri (1.11.1)
-      mini_portile2 (~> 2.5.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     nokogumbo (2.0.4)
       nokogiri (~> 1.8, >= 1.8.4)
@@ -430,7 +421,7 @@ GEM
     public_suffix (4.0.6)
     puma (5.1.1)
       nio4r (~> 2.0)
-    racc (1.5.2)
+    racc (1.6.0)
     rack (2.2.3)
     rack-mobile-detect (0.4.0)
       rack
@@ -683,7 +674,6 @@ DEPENDENCIES
   pry
   pry-byebug
   puma
-  puma-plugin-systemd!
   rails (~> 5.2)
   rb-fsevent (~> 0.9.1)
   rb-inotify (~> 0.9)