diff --git a/Gemfile.lock b/Gemfile.lock
index 3167650..39f4cac 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,13 +22,15 @@ GEM
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     racc (1.7.3)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     slather (2.7.2)
       CFPropertyList (>= 2.2, < 4)
       activesupport
       clamp (~> 1.3)
       nokogiri (~> 1.12)
       xcodeproj (~> 1.21)
+    strscan (3.1.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     xcodeproj (1.22.0)