diff --git a/prawn-emoji.gemspec b/prawn-emoji.gemspec
index 11adaa14..35b41488 100644
--- a/prawn-emoji.gemspec
+++ b/prawn-emoji.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
   spec.require_path  = 'lib'
 
   spec.add_runtime_dependency 'prawn', '~> 2.4'
-  spec.add_runtime_dependency 'unicode-emoji', '~> 3.1'
+  spec.add_runtime_dependency 'unicode-emoji', '>= 3.1', '< 5.0'
   # Workaround for gem loading error in ruby 3.1
   # https://github.com/prawnpdf/prawn/issues/1235
   spec.add_runtime_dependency 'matrix', '~> 0.4'