diff --git a/Gemfile.lock b/Gemfile.lock
index 41a344c..1fec8ae 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -780,12 +780,14 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.12.2)
     msgpack (1.2.4)
-    multi_json (1.13.1)
+    multi_json (1.15.0)
     nio4r (2.5.2)
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
@@ -838,8 +840,7 @@ GEM
     responders (2.4.1)
       actionpack (>= 4.2.0, < 6.0)
       railties (>= 4.2.0, < 6.0)
-    rollbar (2.18.2)
-      multi_json
+    rollbar (3.2.0)
     rubocop (0.73.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)