diff --git a/Gemfile.lock b/Gemfile.lock
index 54316f8..17b9fe4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,16 +15,14 @@ GEM
       safe_yaml (~> 1.0.0)
     diff-lcs (1.2.5)
     hashdiff (0.3.0)
-    httparty (0.20.0)
-      mime-types (~> 3.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     json (1.8.5)
     method_source (0.8.2)
-    mime-types (3.3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2021.0901)
+    mini_mime (1.1.2)
     mini_portile (0.5.3)
     minitest (5.11.3)
     multi_json (1.13.1)