diff --git a/pyproject.toml b/pyproject.toml
index 3a7dc5c..a273e84 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ classifiers = [
 
 dependencies = [
     "beautifulsoup4",
-    "ccflow>=0.5.2",
+    "ccflow>=0.9.0",
     "chatom>=0.2.0",
     "croniter",
     "csp>=0.9,<1",