diff --git a/layman_docs_api/Gemfile b/layman_docs_api/Gemfile
index e2765fb..f859b59 100644
--- a/layman_docs_api/Gemfile
+++ b/layman_docs_api/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.2'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 # gem 'jbuilder', '~> 2.7'
 # Use Redis adapter to run Action Cable in production
diff --git a/layman_docs_api/Gemfile.lock b/layman_docs_api/Gemfile.lock
index 15af59f..d81c4d7 100644
--- a/layman_docs_api/Gemfile.lock
+++ b/layman_docs_api/Gemfile.lock
@@ -91,19 +91,21 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (1.0.0)
-    mimemagic (0.3.5)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
     msgpack (1.3.3)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     pg (1.2.3)
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    puma (4.3.3)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-cors (1.1.1)
@@ -176,7 +178,7 @@ DEPENDENCIES
   nokogiri
   pg (>= 0.18, < 2.0)
   pry
-  puma (~> 4.1)
+  puma (~> 4.3)
   rack-cors
   rails (~> 6.0.2, >= 6.0.2.2)
   spring