diff --git a/fog.gemspec b/fog.gemspec
index 686c5f3c8..559f7cb84 100644
--- a/fog.gemspec
+++ b/fog.gemspec
@@ -41,7 +41,7 @@ Gem::Specification.new do |s|
 
   ## List your runtime dependencies here. Runtime dependencies are those
   ## that are needed for an end user to actually USE your code.
-  s.add_dependency("fog-core", "~> 1.21.0")
+  s.add_dependency("fog-core", "~> 1.21.1")
   s.add_dependency("fog-json")
 
   s.add_dependency('nokogiri', '>=1.5.11')