diff --git a/Gemfile b/Gemfile
index 088d2222..935549a1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ ruby "2.5.8"
 
 gem "rails", "~> 5.2.4.6"
 gem "bootsnap", require: false
-gem "rack", "2.2.6.3"
+gem "rack", "2.2.6.4"
 gem "puma", "4.3.12"
 
 gem "pg"
diff --git a/Gemfile.lock b/Gemfile.lock
index e1b91b5d..c0bfbec2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -415,7 +415,7 @@ GEM
     rabl (0.11.6)
       activesupport (>= 2.3.14)
     racc (1.6.2)
-    rack (2.2.6.3)
+    rack (2.2.6.4)
     rack-contrib (2.1.0)
       rack (~> 2.0)
     rack-cors (1.1.1)
@@ -640,7 +640,7 @@ DEPENDENCIES
   public_suffix (= 3.0.3)
   puma (= 4.3.12)
   rabl
-  rack (= 2.2.6.3)
+  rack (= 2.2.6.4)
   rack-cors
   rails (~> 5.2.4.6)
   rails_12factor