diff --git a/Gemfile.lock b/Gemfile.lock
index 1738436..11ec236 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -25,9 +25,11 @@ GEM
     builder (3.2.3)
     concurrent-ruby (1.0.5)
     dotenv (2.2.1)
-    httparty (0.15.5)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     i18n (0.8.4)
+    mini_mime (1.1.2)
     minitest (5.10.2)
     multi_xml (0.6.0)
     mustermann (1.0.0)