diff --git a/Gemfile.lock b/Gemfile.lock
index f97fb95..8cbcff5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -310,7 +310,8 @@ GEM
       railties (>= 5.2)
     reverse_markdown (2.1.1)
       nokogiri
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rinku (2.0.6)
     rspec-core (3.12.2)
       rspec-support (~> 3.12.0)
@@ -413,6 +414,7 @@ GEM
       lint_roller (~> 1.1)
       rubocop-performance (~> 1.19.0)
     stringio (3.1.0)
+    strscan (3.1.0)
     thor (1.3.1)
     tilt (2.3.0)
     timeout (0.4.1)