diff --git a/wayback_machine_downloader.gemspec b/wayback_machine_downloader.gemspec
index aefe102..0191d7b 100644
--- a/wayback_machine_downloader.gemspec
+++ b/wayback_machine_downloader.gemspec
@@ -12,8 +12,10 @@ Gem::Specification.new do |s|
   s.homepage    = "https://github.com/hartator/wayback-machine-downloader"
   s.license     = "MIT"
   s.required_ruby_version = '>= 1.9.2'
-  s.add_development_dependency 'pry-rescue', '~> 1.4'
-  s.add_development_dependency 'pry-stack_explorer', '~> 0.4'
+  unless ENV["TRAVIS"]
+    s.add_development_dependency 'pry-rescue', '~> 1.4'
+    s.add_development_dependency 'pry-stack_explorer', '~> 0.4'
+  end
   s.add_development_dependency 'rake', '~> 10.2'
   s.add_development_dependency 'minitest', '~> 5.2'
 end