diff --git a/Gemfile.lock b/Gemfile.lock
index 2d49055..8c2a2df 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -49,8 +49,8 @@ GEM
       sorted_set (~> 1.0)
     io-console (0.8.1)
     json_schema (0.21.0)
-    kramdown (2.5.1)
-      rexml (>= 3.3.9)
+    kramdown (2.5.2)
+      rexml (>= 3.4.4)
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
@@ -126,7 +126,7 @@ GEM
     redcarpet (3.6.1)
     reline (0.6.2)
       io-console (~> 0.5)
-    rexml (3.4.2)
+    rexml (3.4.4)
     rspec (3.13.2)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)