diff --git a/Gemfile b/Gemfile
index 13978a5..267a824 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ gem "bootsnap", require: false
 # Use postgresql as the database for Active Record
 gem "pg", "~> 0.18"
 # Use Puma as the app server
-gem "puma", "~> 4.0"
+gem "puma", "~> 4.3"
 # Bootstrap : css framework
 gem "bootstrap-sass", "~> 3.4.1"
 # Fontawesome
diff --git a/Gemfile.lock b/Gemfile.lock
index 7fb7260..2af5284 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -386,7 +386,9 @@ GEM
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2019.1009)
-    mimemagic (0.3.4)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
@@ -402,7 +404,7 @@ GEM
       net-ssh (>= 2.6.5)
     net-ssh (5.2.0)
     netrc (0.11.0)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     open4 (1.3.0)
@@ -420,7 +422,7 @@ GEM
       mimemagic (~> 0.3.0)
     pg (0.21.0)
     public_suffix (4.0.5)
-    puma (4.3.3)
+    puma (4.3.12)
       nio4r (~> 2.0)
     qiniu (6.9.0)
       mime-types (~> 3.1)
@@ -593,7 +595,7 @@ DEPENDENCIES
   listen (~> 3.0.5)
   paperclip (~> 5.2.0)
   pg (~> 0.18)
-  puma (~> 4.0)
+  puma (~> 4.3)
   rails (~> 5.2.4)
   rails_admin (~> 1.2)
   rails_admin_import (~> 2.0)