diff --git a/Gemfile.lock b/Gemfile.lock
index 6106875..5c8e050 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -168,7 +168,8 @@ GEM
       loofah (~> 2.2, >= 2.2.2)
     jmespath (1.4.0)
     json (2.3.0)
-    kramdown (2.1.0)
+    kramdown (2.3.1)
+      rexml
     launchy (2.4.3)
       addressable (~> 2.3)
     loofah (2.4.0)
@@ -181,7 +182,9 @@ GEM
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2019.1009)
-    mimemagic (0.3.3)
+    mimemagic (0.4.3)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.13.0)
@@ -213,6 +216,7 @@ GEM
     rake (13.0.1)
     recursive-open-struct (1.1.0)
     regexp_parser (1.6.0)
+    rexml (3.2.4)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)