diff --git a/environment.yml b/environment.yml
index 58b7cc019..bcc09018a 100644
--- a/environment.yml
+++ b/environment.yml
@@ -8,7 +8,7 @@ dependencies:
   - pip:
     - jupyter-book>=1.0.4post1,<2.0
     - quantecon-book-theme==0.15.1
-    - sphinx-tojupyter==0.4.0
+    - sphinx-tojupyter==0.6.0
     - sphinxext-rediraffe==0.2.7
     - sphinx-exercise==1.2.0
     - sphinx-proof==0.2.1