diff --git a/ci/312-latest.yaml b/ci/312-latest.yaml
index 67f6cf5b..a0b955fc 100644
--- a/ci/312-latest.yaml
+++ b/ci/312-latest.yaml
@@ -21,4 +21,4 @@ dependencies:
   - sphinx
   - sphinx-gallery
   - sphinxcontrib-bibtex
-  - sphinx_bootstrap_theme
+  - pydata-sphinx-theme
diff --git a/docs/index.rst b/docs/index.rst
index dd370c29..27b39e9e 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -18,7 +18,7 @@ An Example: Spatial Inequality in Mexico: 1940-2000
         <div class="col-sm-1 col-xs-hidden">
         </div>
         <div class="col-md-3 col-xs-12">
-            <a href="https://nbviewer.jupyter.org/github.com/pysal/inequality/blob/main/docs/user-guide/measure/theil.ipynb" class="thumbnail">
+            <a href="https://nbviewer.org/github/pysal/inequality/blob/main/docs/user-guide/measure/theil.ipynb" class="thumbnail">
                 <img src="_static/images/theil.png" class="img-responsive center-block">
                 <div class="caption text-center">
                 <h6>Spatial Inequality Decomposition (Theil)</h6>
@@ -26,7 +26,7 @@ An Example: Spatial Inequality in Mexico: 1940-2000
             </a>
         </div>
         <div class="col-sm-3 col-xs-12">
-            <a href="http://nbviewer.jupyter.org/github/pysal/inequality/blob/docs/user-guide/measure/theil.ipynb" class="thumbnail">
+            <a href="http://nbviewer.org/github/pysal/inequality/blob/main/docs/user-guide/measure/theil.ipynb" class="thumbnail">
                 <img src="_static/images/regions.png" class="img-responsive center-block">
                 <div class="caption text-center">
                 <h6>Regions</h6>
@@ -34,7 +34,7 @@ An Example: Spatial Inequality in Mexico: 1940-2000
             </a>
         </div>
         <div class="col-sm-3 col-xs-12">
-            <a href="https://nbviewer.jupyter.org/github.com/pysal/inequality/blob/main/docs/user-guide/viz/pengram.ipynb" class="thumbnail">
+            <a href="https://nbviewer.org/github/pysal/inequality/blob/main/docs/user-guide/viz/pengram.ipynb" class="thumbnail">
                 <img src="_static/images/pen.png"
                 class="img-responsive center-block">
                 <div class="caption text-center">