diff --git a/Gemfile.lock b/Gemfile.lock
index 14642872..27bcb677 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -446,7 +446,8 @@ GEM
     responders (3.1.1)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec-core (3.9.3)
       rspec-support (~> 3.9.3)
     rspec-expectations (3.9.4)
@@ -545,6 +546,7 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
+    strscan (3.1.0)
     sxp (1.2.4)
       matrix (~> 0.4)
       rdf (~> 3.2)