diff --git a/Gemfile.lock b/Gemfile.lock
index 388de657f..d47ecab70 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -351,7 +351,8 @@ 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)
     rspec-core (3.12.2)
       rspec-support (~> 3.12.0)
@@ -432,6 +433,7 @@ GEM
     sqlite3 (1.5.1)
       mini_portile2 (~> 2.8.0)
     stringio (3.1.0)
+    strscan (3.1.0)
     terser (1.1.20)
       execjs (>= 0.3.0, < 3)
     thin (1.8.2)