diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 68d6f86..4613856 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -73,8 +73,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rouge (4.1.0)
     ruby2_keywords (0.0.5)
     safe_yaml (1.0.5)
@@ -83,7 +82,6 @@ GEM
     sawyer (0.9.2)
       addressable (>= 2.3.5)
       faraday (>= 0.17.3, < 3)
-    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.4.2)