diff --git a/Gemfile.lock b/Gemfile.lock
index 7741a54..d1c3900 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,14 +22,12 @@ GEM
       safe_yaml (~> 1.0.0)
     diff-lcs (1.3)
     hashdiff (0.3.8)
-    httparty (0.16.4)
-      mime-types (~> 3.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
-    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_xml (0.6.0)
     mustermann (1.0.3)