diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb18e9b..e589891 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- **Changed.** Accepts `rasuvaeff/openapi-contract` `^0.9` alongside `^0.8`.
+  0.9 narrows the contract's public surface — `Operation::__construct()` is
+  `@internal` and the byte budgets moved from `Contract::MAX_*` constants to a
+  `Limits` object — without changing how documents compile or how messages are
+  judged, so this suite passes against both lines and both stay supported.
 - **Changed.** Requires `rasuvaeff/openapi-contract` `^0.8`. That release
   refuses documents 0.7 accepted — an unreadable subschema, a parameter
   declared twice, a boolean written as a string — and reads several things
diff --git a/composer.json b/composer.json
index 31a50fe..3b5e881 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
         "psr/http-factory": "^1.1",
         "psr/http-message": "^1.1 || ^2.0",
         "psr/http-server-handler": "^1.0",
-        "rasuvaeff/openapi-contract": "^0.8",
+        "rasuvaeff/openapi-contract": "^0.8 || ^0.9",
         "rasuvaeff/property-testing-core": "^0.5 || ^0.6"
     },
     "require-dev": {