diff --git a/src/sdk/python/README.md b/src/sdk/python/README.md
index 99ed7c956..8c7872c54 100644
--- a/src/sdk/python/README.md
+++ b/src/sdk/python/README.md
@@ -17,3 +17,8 @@ a = Base.from_u64(42)
 b = Base.from_u64(69)
 a + b == Base.from_u64(111)
 ```
+
+## Randomness
+
+Note that the `random` methods take randomness 
+from the OS on the Rust side.