diff --git a/app/fivetracks-api/Gemfile b/app/fivetracks-api/Gemfile
index d545f76..aaee5aa 100644
--- a/app/fivetracks-api/Gemfile
+++ b/app/fivetracks-api/Gemfile
@@ -11,7 +11,7 @@ gem 'rails', '~> 5.1.5'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
-gem 'puma', '~> 3.7'
+gem 'puma', '~> 3.12'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.5'
 # Use Redis adapter to run Action Cable in production
diff --git a/app/fivetracks-api/Gemfile.lock b/app/fivetracks-api/Gemfile.lock
index 69119a0..ef033b2 100644
--- a/app/fivetracks-api/Gemfile.lock
+++ b/app/fivetracks-api/Gemfile.lock
@@ -97,7 +97,7 @@ GEM
       mini_portile2 (~> 2.3.0)
     orm_adapter (0.5.0)
     pg (1.0.0)
-    puma (3.11.3)
+    puma (3.12.4)
     rack (2.0.4)
     rack-cors (1.0.2)
     rack-test (0.8.3)
@@ -169,7 +169,7 @@ DEPENDENCIES
   jsonapi-resources
   listen (>= 3.0.5, < 3.2)
   pg
-  puma (~> 3.7)
+  puma (~> 3.12)
   rack-cors
   rails (~> 5.1.5)
   spring