diff --git a/core/Gemfile b/core/Gemfile
index 97fba25f..55c4d9c7 100644
--- a/core/Gemfile
+++ b/core/Gemfile
@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 ruby '2.6.3'
 
-gem 'puma', '3.11.0'
+gem 'puma', '3.12.4'
 
 gem 'rails', '5.1.4'
 gem 'pg', '~> 0.21'
diff --git a/core/Gemfile.lock b/core/Gemfile.lock
index 526d869f..39683c49 100644
--- a/core/Gemfile.lock
+++ b/core/Gemfile.lock
@@ -255,7 +255,7 @@ GEM
       binding_of_caller (>= 0.7)
       pry (>= 0.9.11)
     public_suffix (3.0.3)
-    puma (3.11.0)
+    puma (3.12.4)
     rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -415,7 +415,7 @@ DEPENDENCIES
   pry-byebug (~> 1.3.3)
   pry-remote
   pry-stack_explorer
-  puma (= 3.11.0)
+  puma (= 3.12.4)
   railroady
   rails (= 5.1.4)
   rails-observers