diff --git a/Gemfile.lock b/Gemfile.lock
index 3fd2e41..5e14e07 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,6 +19,7 @@ GEM
     rubyzip (1.3.0)
     stringio (0.0.2)
     winrm (2.3.2)
+      rexml (>= 3.2.3.1)
       builder (>= 2.1.2)
       erubis (~> 2.7)
       gssapi (~> 1.2)