diff --git a/Gemfile.lock b/Gemfile.lock
index e83c8cb9..2be658c3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -540,7 +540,8 @@ GEM
     responders (3.1.1)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rouge (4.2.0)
     rqrcode (2.2.0)
       chunky_png (~> 1.0)
@@ -622,6 +623,7 @@ GEM
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
     stringio (3.1.0)
+    strscan (3.1.0)
     swagger-blocks (3.0.0)
     sysexits (1.2.0)
     temple (0.10.3)