diff --git a/Gemfile.lock b/Gemfile.lock
index f9017bf..38e6fbd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -224,8 +224,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rouge (3.26.0)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
@@ -240,7 +239,6 @@ GEM
       faraday (>= 0.17.3, < 3)
     simpleidn (0.2.1)
       unf (~> 0.1.4)
-    strscan (3.1.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     typhoeus (1.4.0)
@@ -251,7 +249,6 @@ GEM
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (1.8.0)
-    webrick (1.8.1)
 
 PLATFORMS
   x64-mingw-ucrt
@@ -260,7 +257,6 @@ PLATFORMS
 DEPENDENCIES
   github-pages
   kramdown (>= 2.3.0)
-  webrick (~> 1.8)
 
 BUNDLED WITH
    2.4.17