diff --git a/Gemfile.lock b/Gemfile.lock
index c3309df..65c7697 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -219,7 +219,8 @@ GEM
     responders (3.1.0)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rss (0.2.9)
       rexml
     ruby-vips (2.1.4)
@@ -253,6 +254,7 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
+    strscan (3.1.0)
     thor (1.3.1)
     tilt (2.2.0)
     timeout (0.4.1)