diff --git a/Gemfile.lock b/Gemfile.lock
index 097bcf8..156b803 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,12 +5,10 @@ GEM
     facebook-messenger (1.4.1)
       httparty (~> 0.13, >= 0.13.7)
       rack (>= 1.4.5)
-    httparty (0.17.1)
-      mime-types (~> 3.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
-    mime-types (3.3)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2019.1009)
+    mini_mime (1.1.2)
     multi_xml (0.6.0)
     mustermann (1.0.3)
     nio4r (2.5.2)