diff --git a/Gemfile b/Gemfile
index dc3285808..a5f83ab75 100644
--- a/Gemfile
+++ b/Gemfile
@@ -41,7 +41,7 @@ gem "paperclip", "~> 5.2.1"
 gem "paranoia", "~> 2.4.2"
 gem "pg", "~> 0.21.0"
 gem "pg_search", "~> 2.0.1"
-gem "puma", "~> 4.3.1"
+gem "puma", "~> 4.3.3"
 gem "recipient_interceptor", "~> 0.2.0"
 gem "redcarpet", "~> 3.4.0"
 gem "responders", "~> 2.4.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index 4e83e2b9a..855cf6f37 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -402,7 +402,7 @@ GEM
       activesupport (>= 4.2)
       arel (>= 6)
     public_suffix (4.0.1)
-    puma (4.3.1)
+    puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.1.1)
     rack-accept (0.4.5)
@@ -661,7 +661,7 @@ DEPENDENCIES
   paranoia (~> 2.4.2)
   pg (~> 0.21.0)
   pg_search (~> 2.0.1)
-  puma (~> 4.3.1)
+  puma (~> 4.3.3)
   rails (= 5.0.7.2)
   rails-assets-leaflet!
   rails-assets-markdown-it (~> 8.2.1)!