diff --git a/Gemfile.lock b/Gemfile.lock
index fcef68f..726cdba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,11 +55,13 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rouge (3.21.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
+    strscan (3.1.0)
     tale (0.2.0)
       jekyll (~> 4.0)
       jekyll-feed (~> 0.10)