diff --git a/Gemfile.lock b/Gemfile.lock
index d26d555..f658437 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -120,7 +120,9 @@ GEM
       mimemagic (~> 0.3.2)
     maruku (0.7.3)
     method_source (1.0.0)
-    mimemagic (0.3.4)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
@@ -174,7 +176,7 @@ GEM
       railties (>= 5.0)
     reverse_markdown (1.4.0)
       nokogiri
-    rexml (3.2.4)
+    rexml (3.2.5)
     rubocop (0.82.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)