diff --git a/Gemfile.lock b/Gemfile.lock
index b3e0d8d..fb8f13e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -28,8 +28,8 @@ GEM
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     hashdiff (0.3.7)
-    httparty (0.16.3)
-      mime-types (~> 3.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     i18n (1.1.0)
       concurrent-ruby (~> 1.0)
@@ -37,9 +37,7 @@ GEM
     json (2.1.0)
     jwt (2.1.0)
     method_source (0.8.2)
-    mime-types (3.2.2)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2018.0812)
+    mini_mime (1.1.2)
     minitest (5.11.3)
     multi_json (1.13.1)
     multi_xml (0.6.0)