diff --git a/src/pyobo/sources/rgd.py b/src/pyobo/sources/rgd.py
index ef81aba1..d1871257 100644
--- a/src/pyobo/sources/rgd.py
+++ b/src/pyobo/sources/rgd.py
@@ -28,7 +28,7 @@
 
 # NOTE unigene id was discontinue in January 18th, 2021 dump
 
-GENES_URL = "https://download.rgd.mcw.edu/data_release/GENES.RAT.txt"
+GENES_URL = "https://download.rgd.mcw.edu/data_release/GENES_RAT.txt"
 GENES_HEADER = [
     "GENE_RGD_ID",
     "SYMBOL",