diff --git a/riemann-syslog-ng.gemspec b/riemann-syslog-ng.gemspec
index 66286de..1375017 100644
--- a/riemann-syslog-ng.gemspec
+++ b/riemann-syslog-ng.gemspec
@@ -30,5 +30,5 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'riemann-tools', '~> 1.0'
+  spec.add_dependency 'riemann-tools', '~> 1.0'
 end