diff --git a/web/Gemfile b/web/Gemfile
index 42390df..d0d2fac 100644
--- a/web/Gemfile
+++ b/web/Gemfile
@@ -7,7 +7,7 @@ gem 'lograge', '~> 0.11.2'
 gem 'phonelib', '~> 0.6'
 gem 'rails', '~> 6.1.3.1'
 gem 'pg', '~> 1.1'
-gem 'puma', '~> 5.0'
+gem 'puma', '~> 5.5'
 gem 'sass-rails', '>= 6'
 gem 'webpacker', '~> 5.0'
 gem 'jbuilder', '~> 2.7'
diff --git a/web/Gemfile.lock b/web/Gemfile.lock
index b7fd610..282b9f3 100644
--- a/web/Gemfile.lock
+++ b/web/Gemfile.lock
@@ -93,12 +93,12 @@ GEM
     mini_mime (1.0.3)
     minitest (5.14.4)
     msgpack (1.4.2)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.2-x86_64-linux)
       racc (~> 1.4)
     pg (1.2.3)
     phonelib (0.6.49)
-    puma (5.2.2)
+    puma (5.5.1)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -189,7 +189,7 @@ DEPENDENCIES
   lograge (~> 0.11.2)
   pg (~> 1.1)
   phonelib (~> 0.6)
-  puma (~> 5.0)
+  puma (~> 5.5)
   rack-mini-profiler (~> 2.0)
   rails (~> 6.1.3.1)
   sass-rails (>= 6)