diff --git a/statesman.gemspec b/statesman.gemspec
index 9ba90f98..9409716f 100644
--- a/statesman.gemspec
+++ b/statesman.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "bundler", "~> 2"
   spec.add_development_dependency "gc_ruboconfig", "~> 3.6.0"
   spec.add_development_dependency "mysql2", ">= 0.4", "< 0.6"
-  spec.add_development_dependency "pg", ">= 0.18", "<= 1.5"
+  spec.add_development_dependency "pg", ">= 0.18", "<= 1.6"
   spec.add_development_dependency "rails", ">= 5.2"
   spec.add_development_dependency "rake", "~> 13.0.0"
   spec.add_development_dependency "rspec", "~> 3.1"