diff --git a/percy-appium-app.gemspec b/percy-appium-app.gemspec
index b49dab8..c219331 100644
--- a/percy-appium-app.gemspec
+++ b/percy-appium-app.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['percy']
 
   spec.add_runtime_dependency 'appium_lib', '>= 11.2.0'
-  spec.add_runtime_dependency 'dotenv', '~> 2.8'
+  spec.add_runtime_dependency 'dotenv', '>= 2.8', '< 4.0'
 
   spec.add_development_dependency 'bundler', '~> 2.4'
   spec.add_development_dependency 'minitest', '~> 5.20'