diff --git a/etc/requirements.usgs.txt b/etc/requirements.usgs.txt
index b0e2557f..72111c44 100644
--- a/etc/requirements.usgs.txt
+++ b/etc/requirements.usgs.txt
@@ -1,2 +1,2 @@
-https://github.com/wpbonelli/flopy/archive/prt-utils.zip
+https://github.com/modflowpy/flopy/archive/develop.zip
 https://github.com/MODFLOW-USGS/modflowapi/archive/develop.zip