diff --git a/builder/bootstrap45/Gemfile.lock b/builder/bootstrap45/Gemfile.lock
index 76bd436..901c76e 100644
--- a/builder/bootstrap45/Gemfile.lock
+++ b/builder/bootstrap45/Gemfile.lock
@@ -42,7 +42,7 @@ GEM
       nokogiri (~> 1.10)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.3.0)
+    kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
@@ -62,7 +62,7 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.4)
+    rexml (3.2.5)
     rouge (3.23.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)