diff --git a/CHANGELOG.md b/CHANGELOG.md
index c0d3d57d..bc7c4f0e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ master
 * Depend on Erubis and remove support for specifying another ERb engine.
 * Removed the ability to set the `sass_cache_path`.
 * Improved /__middleman/ meta pages. For example, sitemap view now calls out ignored resources, prints data/options better, and shows which special locals are available on a page.
+* Bump Uglifier to 2.5.x
 
 3.2.2
 ===
diff --git a/middleman/middleman.gemspec b/middleman/middleman.gemspec
index f14bac91..5056012f 100644
--- a/middleman/middleman.gemspec
+++ b/middleman/middleman.gemspec
@@ -21,9 +21,9 @@ Gem::Specification.new do |s|
   s.add_dependency("middleman-core", Middleman::VERSION)
   s.add_dependency("middleman-sprockets", ">= 3.1.2")
   s.add_dependency("haml", [">= 4.0.5"])
-  s.add_dependency("sass", [">= 3.3.4"])
+  s.add_dependency("sass", [">= 3.3.4", "< 4.0"])
   s.add_dependency("compass", [">= 1.0.0.alpha.19"])
-  s.add_dependency("uglifier", ["~> 2.4.0"])
+  s.add_dependency("uglifier", ["~> 2.5"])
   s.add_dependency("coffee-script", ["~> 2.2.0"])
   s.add_dependency("execjs", ["~> 1.4.0"])
   s.add_dependency("kramdown", ["~> 1.2"])