diff --git a/docs/generators/dart-dio.html b/docs/generators/dart-dio.html
index 2096c7097ef..f78050244c6 100644
--- a/docs/generators/dart-dio.html
+++ b/docs/generators/dart-dio.html
@@ -29,6 +29,7 @@
 <tr><td>sourceFolder</td><td>Source folder for generated code</td><td></td><td>null</td></tr>
 <tr><td>supportDart2</td><td>Support Dart 2.x (Dart 1.x support has been deprecated)</td><td></td><td>true</td></tr>
 <tr><td>nullableFields</td><td>Is the null fields should be in the JSON payload</td><td></td><td>null</td></tr>
+<tr><td>dateLibrary</td><td>Option. Date library to use</td><td><dl><dt><strong>core</strong></dt><dd>Dart core library (DateTime)</dd><dt><strong>timemachine</strong></dt><dd>Time Machine is date and time library for Flutter, Web, and Server with support for timezones, calendars, cultures, formatting and parsing.</dd><dl></td><td>core</td></tr>
 </tbody>
 </table>
-</span></div></article></div><div class="docLastUpdate"><em>Last updated on 12/4/2019</em></div><div class="docs-prevnext"></div></div></div><nav class="onPageNav"></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/mono-logo.svg" alt="OpenAPI Generator" width="66" height="58"/></a><div><h5>Docs</h5><a href="/docs/en/customization.html">Customizing Generators</a><a href="/docs/en/integrations.html">Workflow Integrations</a></div><div><h5>Community</h5><a href="/en/users.html">User Showcase</a><a href="http://stackoverflow.com/questions/tagged/openapi-generator" target="_blank" rel="noreferrer noopener">Stack Overflow</a><a href="https://join.slack.com/t/openapi-generator/shared_invite/enQtNzAyNDMyOTU0OTE1LTY5ZDBiNDI5NzI5ZjQ1Y2E5OWVjMjZkYzY1ZGM2MWQ4YWFjMzcyNDY5MGI4NjQxNDBiMTlmZTc5NjY2ZTQ5MGM">Chat Room</a><a href="https://twitter.com/oas_generator" target="_blank" rel="noreferrer noopener">Twitter</a></div><div><h5>More</h5><a href="/blog">Blog</a><a href="https://github.com/OpenAPITools/openapi-generator">GitHub Repo</a><a class="github-button" href="https://github.com/OpenAPITools/openapi-generator" data-icon="octicon-star" data-count-href="/OpenAPITools/openapi-generator/stargazers" data-show-count="true" data-count-aria-label="# stargazers on GitHub" aria-label="Star this project on GitHub">Star</a></div></section><section class="copyright">Copyright © 2019 OpenAPI-Generator Contributors (https://openapi-generator.tech). (Both &quot;OpenAPI Tools&quot; (https://OpenAPITools.org) and &quot;OpenAPI Generator&quot; are not affiliated with OpenAPI Initiative (OAI))</section></footer></div></body></html>
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+</span></div></article></div><div class="docLastUpdate"><em>Last updated on 12/16/2019</em></div><div class="docs-prevnext"></div></div></div><nav class="onPageNav"></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/mono-logo.svg" alt="OpenAPI Generator" width="66" height="58"/></a><div><h5>Docs</h5><a href="/docs/en/customization.html">Customizing Generators</a><a href="/docs/en/integrations.html">Workflow Integrations</a></div><div><h5>Community</h5><a href="/en/users.html">User Showcase</a><a href="http://stackoverflow.com/questions/tagged/openapi-generator" target="_blank" rel="noreferrer noopener">Stack Overflow</a><a href="https://join.slack.com/t/openapi-generator/shared_invite/enQtNzAyNDMyOTU0OTE1LTY5ZDBiNDI5NzI5ZjQ1Y2E5OWVjMjZkYzY1ZGM2MWQ4YWFjMzcyNDY5MGI4NjQxNDBiMTlmZTc5NjY2ZTQ5MGM">Chat Room</a><a href="https://twitter.com/oas_generator" target="_blank" rel="noreferrer noopener">Twitter</a></div><div><h5>More</h5><a href="/blog">Blog</a><a href="https://github.com/OpenAPITools/openapi-generator">GitHub Repo</a><a class="github-button" href="https://github.com/OpenAPITools/openapi-generator" data-icon="octicon-star" data-count-href="/OpenAPITools/openapi-generator/stargazers" data-show-count="true" data-count-aria-label="# stargazers on GitHub" aria-label="Star this project on GitHub">Star</a></div></section><section class="copyright">Copyright © 2019 OpenAPI-Generator Contributors (https://openapi-generator.tech). (Both &quot;OpenAPI Tools&quot; (https://OpenAPITools.org) and &quot;OpenAPI Generator&quot; are not affiliated with OpenAPI Initiative (OAI))</section></footer></div></body></html>
\ No newline at end of file
diff --git a/docs/generators/dart-dio/index.html b/docs/generators/dart-dio/index.html
index 2096c7097ef..f78050244c6 100644
--- a/docs/generators/dart-dio/index.html
+++ b/docs/generators/dart-dio/index.html
@@ -29,6 +29,7 @@
 <tr><td>sourceFolder</td><td>Source folder for generated code</td><td></td><td>null</td></tr>
 <tr><td>supportDart2</td><td>Support Dart 2.x (Dart 1.x support has been deprecated)</td><td></td><td>true</td></tr>
 <tr><td>nullableFields</td><td>Is the null fields should be in the JSON payload</td><td></td><td>null</td></tr>
+<tr><td>dateLibrary</td><td>Option. Date library to use</td><td><dl><dt><strong>core</strong></dt><dd>Dart core library (DateTime)</dd><dt><strong>timemachine</strong></dt><dd>Time Machine is date and time library for Flutter, Web, and Server with support for timezones, calendars, cultures, formatting and parsing.</dd><dl></td><td>core</td></tr>
 </tbody>
 </table>
-</span></div></article></div><div class="docLastUpdate"><em>Last updated on 12/4/2019</em></div><div class="docs-prevnext"></div></div></div><nav class="onPageNav"></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/mono-logo.svg" alt="OpenAPI Generator" width="66" height="58"/></a><div><h5>Docs</h5><a href="/docs/en/customization.html">Customizing Generators</a><a href="/docs/en/integrations.html">Workflow Integrations</a></div><div><h5>Community</h5><a href="/en/users.html">User Showcase</a><a href="http://stackoverflow.com/questions/tagged/openapi-generator" target="_blank" rel="noreferrer noopener">Stack Overflow</a><a href="https://join.slack.com/t/openapi-generator/shared_invite/enQtNzAyNDMyOTU0OTE1LTY5ZDBiNDI5NzI5ZjQ1Y2E5OWVjMjZkYzY1ZGM2MWQ4YWFjMzcyNDY5MGI4NjQxNDBiMTlmZTc5NjY2ZTQ5MGM">Chat Room</a><a href="https://twitter.com/oas_generator" target="_blank" rel="noreferrer noopener">Twitter</a></div><div><h5>More</h5><a href="/blog">Blog</a><a href="https://github.com/OpenAPITools/openapi-generator">GitHub Repo</a><a class="github-button" href="https://github.com/OpenAPITools/openapi-generator" data-icon="octicon-star" data-count-href="/OpenAPITools/openapi-generator/stargazers" data-show-count="true" data-count-aria-label="# stargazers on GitHub" aria-label="Star this project on GitHub">Star</a></div></section><section class="copyright">Copyright © 2019 OpenAPI-Generator Contributors (https://openapi-generator.tech). (Both &quot;OpenAPI Tools&quot; (https://OpenAPITools.org) and &quot;OpenAPI Generator&quot; are not affiliated with OpenAPI Initiative (OAI))</section></footer></div></body></html>
\ No newline at end of file
+</span></div></article></div><div class="docLastUpdate"><em>Last updated on 12/16/2019</em></div><div class="docs-prevnext"></div></div></div><nav class="onPageNav"></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/mono-logo.svg" alt="OpenAPI Generator" width="66" height="58"/></a><div><h5>Docs</h5><a href="/docs/en/customization.html">Customizing Generators</a><a href="/docs/en/integrations.html">Workflow Integrations</a></div><div><h5>Community</h5><a href="/en/users.html">User Showcase</a><a href="http://stackoverflow.com/questions/tagged/openapi-generator" target="_blank" rel="noreferrer noopener">Stack Overflow</a><a href="https://join.slack.com/t/openapi-generator/shared_invite/enQtNzAyNDMyOTU0OTE1LTY5ZDBiNDI5NzI5ZjQ1Y2E5OWVjMjZkYzY1ZGM2MWQ4YWFjMzcyNDY5MGI4NjQxNDBiMTlmZTc5NjY2ZTQ5MGM">Chat Room</a><a href="https://twitter.com/oas_generator" target="_blank" rel="noreferrer noopener">Twitter</a></div><div><h5>More</h5><a href="/blog">Blog</a><a href="https://github.com/OpenAPITools/openapi-generator">GitHub Repo</a><a class="github-button" href="https://github.com/OpenAPITools/openapi-generator" data-icon="octicon-star" data-count-href="/OpenAPITools/openapi-generator/stargazers" data-show-count="true" data-count-aria-label="# stargazers on GitHub" aria-label="Star this project on GitHub">Star</a></div></section><section class="copyright">Copyright © 2019 OpenAPI-Generator Contributors (https://openapi-generator.tech). (Both &quot;OpenAPI Tools&quot; (https://OpenAPITools.org) and &quot;OpenAPI Generator&quot; are not affiliated with OpenAPI Initiative (OAI))</section></footer></div></body></html>
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