diff --git a/jekyll-theme-basically-basic.gemspec b/jekyll-theme-basically-basic.gemspec
index 62a97f9..3333b5d 100644
--- a/jekyll-theme-basically-basic.gemspec
+++ b/jekyll-theme-basically-basic.gemspec
@@ -15,12 +15,12 @@ Gem::Specification.new do |spec|
     f.match(%r{^(assets|_(includes|layouts|sass)/|(LICENSE|README|CHANGELOG)((\.(txt|md|markdown)|$)))}i)
   end
 
-  spec.add_runtime_dependency "jekyll", "~> 3.3"
-  spec.add_runtime_dependency "jekyll-feed", "~> 0.8"
+  spec.add_runtime_dependency "jekyll", "~> 3.7"
+  spec.add_runtime_dependency "jekyll-feed", "~> 0.10"
   spec.add_runtime_dependency "jekyll-paginate", "~> 1.1"
-  spec.add_runtime_dependency "jekyll-seo-tag", "~> 2.4", ">= 2.3"
-  spec.add_runtime_dependency "jekyll-sitemap", "~> 1.0"
+  spec.add_runtime_dependency "jekyll-seo-tag", "~> 2.5"
+  spec.add_runtime_dependency "jekyll-sitemap", "~> 1.2"
 
-  spec.add_development_dependency "bundler", "~> 1.12"
+  spec.add_development_dependency "bundler", "~> 1.15"
   spec.add_development_dependency "rake", "~> 10.0"
 end