diff --git a/environment.yml b/environment.yml
index e46d69882..0ffb1998b 100644
--- a/environment.yml
+++ b/environment.yml
@@ -8,7 +8,7 @@ dependencies:
   - seaborn
   - pandas
   - scipy
-  pip:
-    - ThinkStats2
+  - pip:
+    - thinkstats2