diff --git a/environment.yml b/environment.yml
index b48e4426..d84907f9 100644
--- a/environment.yml
+++ b/environment.yml
@@ -26,10 +26,10 @@ dependencies:
 - xlwt
 - statsmodels
 - linearmodels
-- rpy2>=3.5.12
 - black>=24.1.1
 - pip
 - pip:
+  - rpy2>=3.5.12
   - openpyxl>=3.1.2
   - cs-kit
   - cs2tc