diff --git a/blacklight.gemspec b/blacklight.gemspec
index 1265916f9..748d742b0 100644
--- a/blacklight.gemspec
+++ b/blacklight.gemspec
@@ -30,7 +30,7 @@ Gem::Specification.new do |s|
   s.add_dependency "jbuilder"
   s.add_dependency "nokogiri",  "~>1.6"     # XML Parser
   s.add_dependency "kaminari", ">= 0.15" # the pagination (page 1,2,3, etc..) of our search results
-  s.add_dependency "bootstrap", ">= 4.0.0.beta", "< 5"
+  s.add_dependency "bootstrap", "~> 4.0"
   s.add_dependency "popper_js"
   s.add_dependency "deprecation"
   s.add_dependency "twitter-typeahead-rails", '0.11.1.pre.corejavascript'