diff --git a/test-filesource-optional-requirements.txt b/test-filesource-optional-requirements.txt
index e81baf49..43d7a2bc 100644
--- a/test-filesource-optional-requirements.txt
+++ b/test-filesource-optional-requirements.txt
@@ -1,2 +1,2 @@
-pyyaml>=5.3
+pyyaml>=5.3.1
 watchdog>=3.0.0