diff --git a/queue_classic.gemspec b/queue_classic.gemspec
index 93f1b9a6..de8bd23a 100644
--- a/queue_classic.gemspec
+++ b/queue_classic.gemspec
@@ -18,5 +18,5 @@ Gem::Specification.new do |s|
 
   s.require_paths = %w[lib]
 
-  s.add_dependency "pg", ">= 0.17", "< 0.19"
+  s.add_dependency "pg", ">= 0.17", "< 1.3"
 end