Update novu.gemspec

novu.gemspec

@@ -32,10 +32,10 @@ Gem::Specification.new do |spec|
   # Uncomment to register a new dependency of your gem
   # spec.add_dependency "example-gem", "~> 1.0"
 
-  spec.add_dependency "activesupport", ">= 6.1.7.2"
-  spec.add_dependency "exponential-backoff"
+  spec.add_dependency "activesupport", "~> 6.1", ">= 6.1.7.2"
+  spec.add_dependency "exponential-backoff", "~> 0.0.4"
   spec.add_dependency "httparty", "~> 0.21"
-  spec.add_dependency "uuid", '~> 2.3', '>= 2.3.9'
+  spec.add_dependency "uuid", "~> 2.3", ">= 2.3.9"
 
   # For more information and examples about making a new gem, check out our
   # guide at: https://bundler.io/guides/creating_gem.html