diff --git a/fog.gemspec b/fog.gemspec
index 70dc0b3df..06a39d790 100644
--- a/fog.gemspec
+++ b/fog.gemspec
@@ -47,9 +47,12 @@ Gem::Specification.new do |s|
   s.add_dependency('mime-types')
   s.add_dependency('net-scp', '~>1.1')
   s.add_dependency('net-ssh', '>=2.1.3')
-  s.add_dependency('nokogiri', '~>1.5.0')
   s.add_dependency('ruby-hmac')
 
+  # Nokogiri >= 1.6 drops support for Ruby 1.8.7 so should not be used
+  # See https://github.com/fog/fog/issues/1878 for more details
+  s.add_dependency('nokogiri', '~>1.5.0')
+
   ## List your development dependencies here. Development dependencies are
   ## those that are only needed during development
   s.add_development_dependency('jekyll')