diff --git a/Gemfile b/Gemfile
index c93a3779..ab8fc5ef 100644
--- a/Gemfile
+++ b/Gemfile
@@ -19,7 +19,7 @@ gem 'jquery-rails'
 gem 'jquery-ui-rails'
 gem 'pg'
 gem 'pg_search'
-gem 'puma', '~> 4.x'
+gem 'puma', '~> 4'
 gem 'rollbar'
 gem 'sass-rails', '~> 5.x'
 gem 'select2-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index 7403a416..03b33450 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -192,7 +192,7 @@ GEM
       activerecord (>= 5.2)
       activesupport (>= 5.2)
     public_suffix (4.0.6)
-    puma (4.3.10)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)
@@ -367,7 +367,7 @@ DEPENDENCIES
   listen
   pg
   pg_search
-  puma (~> 4.x)
+  puma (~> 4)
   rack-attack
   rails (~> 6.x)
   rollbar