diff --git a/logstash-input-file.gemspec b/logstash-input-file.gemspec
index f55e314..a83753c 100644
--- a/logstash-input-file.gemspec
+++ b/logstash-input-file.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.metadata = { "logstash_plugin" => "true", "logstash_group" => "input" }
 
   # Gem dependencies
-  s.add_runtime_dependency "logstash-core", ">= 2.0.0", "< 3.0.0"
+  s.add_runtime_dependency "logstash-core", "~> 2.0.0.snapshot"
 
   s.add_runtime_dependency 'logstash-codec-plain'
   s.add_runtime_dependency 'addressable'