diff --git a/Gemfile b/Gemfile
index 9c1c585..05fb0fd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'httparty', '~> 0.16.4'
+gem 'httparty', '~> 0.21.0'
 gem 'prawn', '~> 2.2'
 gem 'pry', '~> 0.12.2'
 gem 'rubocop', '0.56.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 48384a7..d6402c7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,14 +12,12 @@ GEM
     docile (1.3.1)
     hashdiff (0.3.8)
     hirb (0.7.3)
-    httparty (0.16.4)
-      mime-types (~> 3.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     json (2.3.1)
     method_source (0.9.2)
-    mime-types (3.2.2)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2018.0812)
+    mini_mime (1.1.2)
     multi_xml (0.6.0)
     parallel (1.13.0)
     parser (2.6.0.0)
@@ -76,7 +74,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  httparty (~> 0.16.4)
+  httparty (~> 0.21.0)
   prawn (~> 2.2)
   pry (~> 0.12.2)
   rspec