diff --git a/environment.yml b/environment.yml
index daf2a2c49..e848d0284 100644
--- a/environment.yml
+++ b/environment.yml
@@ -1,4 +1,6 @@
 name: taxcalc-dev
+channels:
+  - conda-forge
 dependencies:
 - "python>=3.9, <3.13"
 - "numpy>=1.26,<1.27"