diff --git a/docs/src/test-api/class-testconfig.md b/docs/src/test-api/class-testconfig.md
index 7eace0f88a..6e98c8631f 100644
--- a/docs/src/test-api/class-testconfig.md
+++ b/docs/src/test-api/class-testconfig.md
@@ -113,7 +113,7 @@ export default config;
 ```
 
 ## property: TestConfig.fullyParallel
-* since: v1.10
+* since: v1.20
 - type: ?<[boolean]>
 
 Playwright Test runs tests in parallel. In order to achieve that, it runs several worker processes that run at the same time.