diff --git a/environment.yml b/environment.yml
index f6046e03..b3fbd8c6 100644
--- a/environment.yml
+++ b/environment.yml
@@ -10,7 +10,7 @@ dependencies:
     - quantecon-book-theme==0.15.1
     - sphinx-tojupyter==0.3.1
     - sphinxext-rediraffe==0.2.7
-    - sphinx-exercise==1.0.1
+    - sphinx-exercise==1.2.1
     - sphinx-proof==0.3.0
     - sphinxcontrib-youtube==1.4.1
     - sphinx-togglebutton==0.3.2
diff --git a/lectures/_config.yml b/lectures/_config.yml
index cb5e87d1..5ca9ecf7 100644
--- a/lectures/_config.yml
+++ b/lectures/_config.yml
@@ -118,6 +118,8 @@ sphinx:
           "gG": "\\mathcal{G}"
           "hH": "\\mathcal{H}"
     mathjax_path: https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
+    # sphinx-exercise
+    exercise_style: "solution_follow_exercise"
     rediraffe_redirects:
       index_toc.md: intro.md
     tojupyter_static_file_path: ["source/_static", "_static"]