diff --git a/Gemfile.lock b/Gemfile.lock
index d9d68fda..23c663da 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -218,7 +218,8 @@ GEM
     responders (3.0.1)
       actionpack (>= 5.0)
       railties (>= 5.0)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec-core (3.12.2)
       rspec-support (~> 3.12.0)
     rspec-expectations (3.12.3)
@@ -253,6 +254,7 @@ GEM
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
     stripe (11.2.0)
+    strscan (3.1.0)
     thor (1.3.1)
     tilt (2.0.10)
     timeout (0.4.1)