Gemfile in logstash-input-perfmon-0.1.4 vs Gemfile in logstash-input-perfmon-0.1.5

@@ -1,2 +1,6 @@
 source 'https://rubygems.org'
-gemspec
+gemspec
+
+gem 'logstash-core', '~> 2.1'
+gem 'logstash-codec-plain', '~> 2.0'
+gem 'logstash-devutils', '~> 0'
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