diff --git a/pincode-validator.gemspec b/pincode-validator.gemspec
index ad05672..3159fe5 100644
--- a/pincode-validator.gemspec
+++ b/pincode-validator.gemspec
@@ -8,7 +8,7 @@ Gem::Specification.new do |spec|
 
   spec.summary       = %q{A simple regex based offline validator for PIN codes in India}
   spec.homepage      = "https://github.com/captn3m0/india-pincode-regex"
-  spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
+  spec.required_ruby_version = Gem::Requirement.new(">= 2.5.0")
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "https://github.com/captn3m0/india-pincode-regex"