diff --git a/client/client.gemspec b/client/client.gemspec
index 9dd9b68..fa42a78 100644
--- a/client/client.gemspec
+++ b/client/client.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency "nanoc", "~> 4.12"
   gem.add_development_dependency "sass", "~> 3.7"
   gem.add_development_dependency "rainpress", "~> 1.0"
-  gem.add_development_dependency "nanoc-webpack.rb", "~> 0.9"
+  gem.add_development_dependency "nanoc-webpack.rb", "~> 0.10"
   gem.add_development_dependency "listen", "~> 3.8"
   gem.add_development_dependency "standard", "~> 1.35"
 end
diff --git a/client/client.gemspec.tt b/client/client.gemspec.tt
index 9361450..1bb53cb 100644
--- a/client/client.gemspec.tt
+++ b/client/client.gemspec.tt
@@ -17,7 +17,7 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency "nanoc", "~> 4.12"
   gem.add_development_dependency "sass", "~> 3.7"
   gem.add_development_dependency "rainpress", "~> 1.0"
-  gem.add_development_dependency "nanoc-webpack.rb", "~> 0.9"
+  gem.add_development_dependency "nanoc-webpack.rb", "~> 0.10"
   gem.add_development_dependency "listen", "~> 3.8"
   gem.add_development_dependency "standard", "~> 1.35"
 end