diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
index 554d6bd9ec7..9de7f88e09a 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -10,6 +10,7 @@ assignees: ''
 #### Bug Report Checklist
 
 - [ ] Have you provided a full/minimal spec to reproduce the issue?
+- [ ] Have you validated the input using an OpenAPI validator ([example](https://apidevtools.org/swagger-parser/online/))?
 - [ ] What's the version of OpenAPI Generator used?
 - [ ] Have you search for related issues/PRs?
 - [ ] What's the actual output vs expected output?