diff --git a/setup.py b/setup.py
index 7f95543636a6..b5679aa5603f 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
     "anyio==3.6.2",
     "boto3==1.26.131",  # AWS S3 for DL s3 plugin
     "blspy==1.0.16",  # Signature library
-    "chiavdf==1.0.8",  # timelord and vdf verification
+    "chiavdf==1.0.9",  # timelord and vdf verification
     "chiabip158==1.2",  # bip158-style wallet filters
     "chiapos==1.0.11",  # proof of space
     "clvm==0.9.7",