diff --git a/IapExample/Gemfile.lock b/IapExample/Gemfile.lock
index 5c50bdc2a..54285cb51 100644
--- a/IapExample/Gemfile.lock
+++ b/IapExample/Gemfile.lock
@@ -72,8 +72,10 @@ GEM
     nap (1.1.0)
     netrc (0.11.0)
     public_suffix (4.0.7)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     ruby-macho (2.5.1)
+    strscan (3.1.0)
     typhoeus (1.4.1)
       ethon (>= 0.9.0)
     tzinfo (2.0.6)