testing/gemfiles/cuke_modeler0.gemfile in cql-1.5.1 vs testing/gemfiles/cuke_modeler0.gemfile in cql-1.6.0

@@ -22,9 +22,16 @@
   gem 'unf_ext', '< 0.0.7.3' # Requires Ruby 2.x on/after this version
 end
 
 if RUBY_VERSION =~ /^2\.[23456789]/
   gem 'test-unit'
+  # Cucumber 4.x uses the `cucumber-gherkin` gem, which is incompatible with
+  # the `gherkin` gem, upon which the `cuke_modeler` gem depends
+  gem 'cucumber', '< 4.0'
+
+  # The oldest versions of the `cuke_modeler` gem did not properly limit their dependencies
+  # and CukeModeler 0.x can not handle a higher Gherkin 5.x+
+  gem 'gherkin', '< 5.0'
 end
 
 
 gem 'cuke_modeler', '~> 0.0'