diff --git a/environment.yml b/environment.yml
index 86b0477df..85b00af6d 100644
--- a/environment.yml
+++ b/environment.yml
@@ -7,10 +7,10 @@ dependencies:
   - pip
   - pip:
     - jupyter-book==1.0.4post1
-    - quantecon-book-theme==0.10.0
+    - quantecon-book-theme==0.10.1
     - sphinx-tojupyter==0.3.1
     - sphinxext-rediraffe==0.2.7
-    - sphinx-exercise==1.0.1
+    - sphinx-exercise==1.2.0
     - sphinx-proof==0.2.1
     - sphinxcontrib-youtube==1.4.1
     - sphinx-togglebutton==0.3.2
diff --git a/lectures/_config.yml b/lectures/_config.yml
index 4b97f1551..c1f90b454 100644
--- a/lectures/_config.yml
+++ b/lectures/_config.yml
@@ -122,6 +122,8 @@ sphinx:
       complex_and_trig: https://intro.quantecon.org/complex_and_trig.html
     # sphinx-proof
     proof_minimal_theme: true
+    # sphinx-exercise
+    exercise_style: "solution_follow_exercise"
     # sphinx-tojupyter
     tojupyter_static_file_path: ["source/_static", "_static"]
     tojupyter_target_html: true