diff --git a/api/source/openapi.yaml b/api/source/openapi.yaml
index d014c3839..1ff1b9cf3 100644
--- a/api/source/openapi.yaml
+++ b/api/source/openapi.yaml
@@ -1,4 +1,4 @@
-openapi: 3.1.0
+openapi: 3.0.0
 
 info:
   title: Mon-entreprise API
diff --git a/api/source/test-e2e/__snapshots__/index.test.ts.snap b/api/source/test-e2e/__snapshots__/index.test.ts.snap
index f13fa75a7..b65f5e1d6 100644
--- a/api/source/test-e2e/__snapshots__/index.test.ts.snap
+++ b/api/source/test-e2e/__snapshots__/index.test.ts.snap
@@ -1058,7 +1058,7 @@ exports[`e2e test mon-entreprise api > Test openapi.json endpoint 2`] = `
     "title": "Mon-entreprise API",
     "version": "v1",
   },
-  "openapi": "3.1.0",
+  "openapi": "3.0.0",
   "paths": {
     "/evaluate": {
       "post": {