diff --git a/README.en.md b/README.en.md
index e323ee6..8316b21 100644
--- a/README.en.md
+++ b/README.en.md
@@ -72,6 +72,8 @@ results/        # per-date folders: results.ru.md + results.en.md + raw runs.jso
 
 ## Running
 
+Requires Python ≥ 3.10 (CI uses 3.11).
+
 Offline self-test (no network/money; CI):
 ```bash
 pip install -r requirements-dev.txt
diff --git a/README.md b/README.md
index 99b0741..70dd25b 100644
--- a/README.md
+++ b/README.md
@@ -72,6 +72,8 @@ results/        # per-date папки: results.ru.md + results.en.md + сыро
 
 ## Запуск
 
+Нужен Python ≥ 3.10 (в CI — 3.11).
+
 Офлайн self-test (без сети/денег; CI):
 ```bash
 pip install -r requirements-dev.txt