diff --git a/data-farming/README.md b/data-farming/README.md
index cb274e9b..8a832d38 100644
--- a/data-farming/README.md
+++ b/data-farming/README.md
@@ -21,7 +21,7 @@ Here are all streams & substreams. The links lead to dedicated pages.
 1. **[Passive DF](passivedf.md).** 75,000 OCEAN per week. Lock OCEAN for **veOCEAN**; rewards are pro-rata to veOCEAN holdings.
 1. **Active DF.** 75,000 OCEAN per week. It has these substreams:
    1. **[Volume DF](volumedf.md).** Allocate veOCEAN towards data assets with high DCV, ie "curate data". Rewards are a function of DCV and veOCEAN stake.
-   1. **[Challenge DF](challengedf.md).** Predict future ETH price, one-time weekly. Rewards are a function of accuracy. Runs from DF48 — DF65.
+   1. **[Challenge DF](challengedf.md).** Predict future ETH price, one-time weekly. Rewards are a function of accuracy. Runs from DF48 — DF66.
    1. **[Predictoor DF](predictoordf.md).** Run prediction bots to earn continuously. Starts on DF62.
 
 All streams and substreams repeat **weekly** that start on Thursdays 00:00 at UTC and end on Wed at 23:59 UTC.