diff --git a/environment.yml b/environment.yml
index 8d49dbad..471ea3d3 100644
--- a/environment.yml
+++ b/environment.yml
@@ -4,10 +4,7 @@ channels:
 dependencies:
   - jupyter-book
   - jupyterlab
-  - jupyter_server<2
-  - pip
-  - pip:
-      - sphinx-pythia-theme
+  - jupyter_server
   - numpy
   - xarray
   - intake
@@ -17,3 +14,19 @@ dependencies:
   - xbatcher
   - intake-xarray
   - gcsfs
+#
+# The balance of this environment file pins several libraries in order for
+# to satisfy dependencies for the sphinx-pythia-theme 2022.3.22 package.
+# 
+  - sphinx==4.5.0
+  - sphinxcontrib-applehelp<1.0.7 
+  - sphinxcontrib-devhelp<1.0.5 
+  - sphinxcontrib-htmlhelp<2.0.4 
+  - sphinxcontrib-qthelp<1.0.6 
+  - sphinxcontrib-serializinghtml<1.1.9
+  - pydata-sphinx-theme<=0.8
+  - jsonschema-with-format-nongpl<4.19.1
+  - docutils==0.16
+  - pip
+  - pip:
+      - sphinx-pythia-theme