diff --git a/Gemfile b/Gemfile
index 1ed7462c7..fcb096dcd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,7 +38,7 @@ gem 'rack-test', '1.1.0'
 gem 'rake', '13.0.1'
 
 gem 'truncate_html'
-gem 'puma', '~> 4.3.1'
+gem 'puma', '~> 4.3.9'
 gem 'tzinfo' # For timezone support
 
 # Bootstrap Datepicker
diff --git a/Gemfile.lock b/Gemfile.lock
index dc3638fd4..7e5eff5a9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -297,7 +297,7 @@ GEM
     multipart-post (2.1.1)
     mustache (1.1.1)
     mysql2 (0.5.3)
-    nio4r (2.5.5)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     oauth (0.5.4)
@@ -338,7 +338,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.5)
-    puma (4.3.5)
+    puma (4.3.9)
       nio4r (~> 2.0)
     rabl (0.14.3)
       activesupport (>= 2.3.14)
@@ -539,7 +539,7 @@ DEPENDENCIES
   pandarus (~> 0.6.7)
   progress_job
   pry
-  puma (~> 4.3.1)
+  puma (~> 4.3.9)
   rabl
   rack (= 2.2.2)
   rack-cors