diff --git a/roo-xls.gemspec b/roo-xls.gemspec
index 6b5bf38..ee0c505 100644
--- a/roo-xls.gemspec
+++ b/roo-xls.gemspec
@@ -22,6 +22,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency "nokogiri"
   spec.add_dependency "spreadsheet", "> 0.9.0"
 
-  spec.add_development_dependency "bundler", ">= 1.7"
+  spec.add_development_dependency "bundler", ">= 1.10"
   spec.add_development_dependency "rake", ">= 10.0"
 end