diff --git a/Gemfile b/Gemfile
index 29ba363e..259eade1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -27,7 +27,7 @@ gem 'loofah', '>= 2.2.3'
 gem 'mysql2', '~> 0.5'
 gem 'pkg-config', '~> 1.1'
 # Use Puma as the app server
-gem 'puma', '~> 5.5'
+gem 'puma', '~> 5.6'
 gem 'rack', '>= 2.0.6'
 gem 'rails', '~> 5.1.6'
 gem 'redcarpet'
diff --git a/Gemfile.lock b/Gemfile.lock
index 452851a7..591665e8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -596,7 +596,7 @@ GEM
     powerpack (0.1.3)
     public_suffix (4.0.6)
     pul_uv_rails (2.0.1)
-    puma (5.5.2)
+    puma (5.6.4)
       nio4r (~> 2.0)
     qa (2.3.0)
       activerecord-import
@@ -943,7 +943,7 @@ DEPENDENCIES
   loofah (>= 2.2.3)
   mysql2 (~> 0.5)
   pkg-config (~> 1.1)
-  puma (~> 5.5)
+  puma (~> 5.6)
   rack (>= 2.0.6)
   rails (~> 5.1.6)
   rb-readline