diff --git a/docker/ruby/Gemfile.lock b/docker/ruby/Gemfile.lock
index 7670d339..93cc7170 100644
--- a/docker/ruby/Gemfile.lock
+++ b/docker/ruby/Gemfile.lock
@@ -86,11 +86,11 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.14.2)
     msgpack (1.3.3)
-    nio4r (2.5.4)
+    nio4r (2.5.2)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     pg (0.21.0)
-    puma (5.0.2)
+    puma (5.6.8)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-test (1.1.0)