diff --git a/environment.yml b/environment.yml
index 9ac283ec..5792c991 100644
--- a/environment.yml
+++ b/environment.yml
@@ -9,7 +9,7 @@ dependencies:
   - pip:
     - jupyter-book==0.15.1
     - docutils==0.17.1
-    - quantecon-book-theme==0.6.0
+    - quantecon-book-theme==0.7.1
     - sphinx-tojupyter==0.3.0
     - sphinxext-rediraffe==0.2.7
     - sphinx-exercise==0.4.1
diff --git a/lectures/_config.yml b/lectures/_config.yml
index 585acf3d..fd50463e 100644
--- a/lectures/_config.yml
+++ b/lectures/_config.yml
@@ -46,6 +46,11 @@ sphinx:
     html_theme: quantecon_book_theme
     html_static_path: ['_static']
     html_theme_options:
+      authors:
+        - name: Thomas J. Sargent
+          url: http://www.tomsargent.com/
+        - name: John Stachurski
+          url: https://johnstachurski.net/ 
       header_organisation_url: https://quantecon.org
       header_organisation: QuantEcon
       repository_url: https://github.com/QuantEcon/lecture-python-intro
diff --git a/lectures/intro.md b/lectures/intro.md
index b7cf4a30..d0bfe9a5 100644
--- a/lectures/intro.md
+++ b/lectures/intro.md
@@ -13,9 +13,6 @@ kernelspec:
 
 This lecture series provides an introduction to quantitative economics using Python. 
 
-The lectures were designed and written by [Thomas J. Sargent](http://www.tomsargent.com/) and [John Stachurski](http://johnstachurski.net/), 
-with extensive help from the rest of the QuantEcon team. 
-
 ```{tableofcontents}
 ```