diff --git a/lib/appraisal/bundler_dsl.rb b/lib/appraisal/bundler_dsl.rb
index e102f4cd..dbb82d4b 100644
--- a/lib/appraisal/bundler_dsl.rb
+++ b/lib/appraisal/bundler_dsl.rb
@@ -65,8 +65,9 @@ def source(source, &block)
       end
     end
 
-    def ruby(ruby_version)
+    def ruby(ruby_version = nil, **kwargs)
       @ruby_version = ruby_version
+      @ruby_version = kwargs unless ruby_version
     end
 
     def git(source, options = {}, &block)
diff --git a/spec/appraisal/gemfile_spec.rb b/spec/appraisal/gemfile_spec.rb
index 666c07ba..d5a869d5 100644
--- a/spec/appraisal/gemfile_spec.rb
+++ b/spec/appraisal/gemfile_spec.rb
@@ -440,4 +440,17 @@
       expect(gemfile.load(tmpfile.path)).to include(File.dirname(tmpfile.path))
     end
   end
+
+  it "supports the ruby file: syntax" do
+    gemfile = Appraisal::Gemfile.new
+
+    gemfile.ruby file: ".ruby-version"
+    gemfile.source "one"
+
+    expect(gemfile.to_s).to eq <<-GEMFILE.strip_heredoc.strip
+      source "one"
+
+      ruby {:file=>".ruby-version"}
+    GEMFILE
+  end
 end