diff --git a/containers/quantecon-build/environment.yml b/containers/quantecon-build/environment.yml
index 735569f..6f0f6af 100644
--- a/containers/quantecon-build/environment.yml
+++ b/containers/quantecon-build/environment.yml
@@ -63,7 +63,7 @@ dependencies:
   - pip:
     # Jupyter Book build tools
     - jupyter-book>=1.0.4post1,<2.0
-    - quantecon-book-theme>=0.21.0
+    - quantecon-book-theme>=0.22.0
     - sphinx-tojupyter>=0.6.0
     - sphinxext-rediraffe>=0.3.0
     - sphinx-exercise>=1.2.1
diff --git a/containers/quantecon/environment.yml b/containers/quantecon/environment.yml
index ab11714..130ae8e 100644
--- a/containers/quantecon/environment.yml
+++ b/containers/quantecon/environment.yml
@@ -14,7 +14,7 @@ dependencies:
   - pip:
     # Jupyter Book build tools
     - jupyter-book==1.0.4post1
-    - quantecon-book-theme==0.21.0
+    - quantecon-book-theme==0.22.0
     - sphinx-tojupyter==0.6.0
     - sphinxext-rediraffe==0.3.0
     - sphinx-exercise==1.2.1