--- a/gems/ipynbdiff/ipynbdiff.gemspec
+++ b/gems/ipynbdiff/ipynbdiff.gemspec
@@ -20,7 +20,7 @@
   s.license = 'MIT'
 
   s.add_runtime_dependency 'diffy', '~> 3.4'
-  s.add_runtime_dependency 'oj', '~> 3.13.16'
+  s.add_runtime_dependency 'oj', '~> 3.13', '>= 3.13.16'
 
   s.add_development_dependency 'benchmark-memory', '~>0.2.0'
   s.add_development_dependency 'bundler', '~> 2.2'