diff --git a/Gemfile.lock b/Gemfile.lock
index 4215bac..61f2ebc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -21,14 +21,12 @@ GEM
       eventmachine (>= 0.12.0)
       websocket-driver (>= 0.5.1)
     hashie (4.1.0)
-    httparty (0.18.0)
-      mime-types (~> 3.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     kwalify (0.7.2)
     method_source (1.0.0)
-    mime-types (3.3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2020.0512)
+    mini_mime (1.1.2)
     multi_xml (0.6.0)
     parallel (1.19.1)
     parser (2.7.1.3)