diff --git a/CHANGELOG.md b/CHANGELOG.md
index 70c5832d..843bd4f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Collections can be flagged as `experimental`
+
 ### Deprecated
 
 ### Changed
diff --git a/openapi.yaml b/openapi.yaml
index a69707b2..98605a63 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -4398,6 +4398,8 @@ components:
             This property REQUIRES to add `version` (STAC < 1.0.0-rc.1) or
             `https://stac-extensions.github.io/version/v1.2.0/schema.json` (STAC >= 1.0.0-rc.1)
             to the list of `stac_extensions`.
+        experimental:
+          $ref: '#/components/schemas/experimental'
         license:
           $ref: '#/components/schemas/stac_license'
         providers: