diff --git a/train-aws.gemspec b/train-aws.gemspec
index 1419909..cbc1588 100644
--- a/train-aws.gemspec
+++ b/train-aws.gemspec
@@ -195,7 +195,7 @@ Gem::Specification.new do |spec|
   # spec.add_dependency "aws-sdk-robomaker", "~> 1.62.0"
   spec.add_dependency "aws-sdk-route53", "~> 1.83.0"
   spec.add_dependency "aws-sdk-route53domains", "~> 1.54.0"
-  spec.add_dependency "aws-sdk-route53resolver", "~> 1.51.0"
+  spec.add_dependency "aws-sdk-route53resolver", ">= 1.51", "< 1.54"
   spec.add_dependency "aws-sdk-s3", "~> 1.141.0"
   spec.add_dependency "aws-sdk-s3control", "~> 1.74.0"
   # spec.add_dependency "aws-sdk-sagemaker", "~> 1.224.0"