diff --git a/Gemfile.lock b/Gemfile.lock
index c1f6f6d..78b5069 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -54,7 +54,8 @@ GEM
       method_source (~> 1.0)
     public_suffix (5.0.3)
     rake (13.0.6)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)
@@ -75,6 +76,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     sync (0.5.0)
     term-ansicolor (1.7.1)
       tins (~> 1.0)
diff --git a/vendor/cache/rexml-3.2.6.gem b/vendor/cache/rexml-3.2.6.gem
deleted file mode 100644
index 71a4946..0000000
Binary files a/vendor/cache/rexml-3.2.6.gem and /dev/null differ
diff --git a/vendor/cache/rexml-3.2.8.gem b/vendor/cache/rexml-3.2.8.gem
new file mode 100644
index 0000000..293c1aa
Binary files /dev/null and b/vendor/cache/rexml-3.2.8.gem differ
diff --git a/vendor/cache/strscan-3.1.0.gem b/vendor/cache/strscan-3.1.0.gem
new file mode 100644
index 0000000..e7bd707
Binary files /dev/null and b/vendor/cache/strscan-3.1.0.gem differ