diff --git a/Gemfile.lock b/Gemfile.lock
index 9564802..6a3af80 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -23,7 +23,9 @@ GEM
     mathn (0.1.0)
     posix-spawn (0.3.15)
     rake (13.0.6)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
+    strscan (3.1.0)
     webrick (1.7.0)
 
 PLATFORMS