diff --git a/environment.yml b/environment.yml
index 81d1b92c..02c5f115 100644
--- a/environment.yml
+++ b/environment.yml
@@ -6,7 +6,7 @@ dependencies:
   - anaconda=2025.06
   - pip
   - pip:
-    - jupyter-book==1.0.4post1
+    - jupyter-book==2.1.0
     - quantecon-book-theme==0.9.2
     - sphinx-tojupyter==0.3.1
     - sphinxext-rediraffe==0.2.7