diff --git a/book/environment.yml b/book/environment.yml
index ded2fa3f..e789e4e1 100755
--- a/book/environment.yml
+++ b/book/environment.yml
@@ -2,10 +2,10 @@ name: eds-book
 channels:
   - conda-forge
 dependencies:
-  - python=3.9
+  - python=3.8
   - pip
   - pip:
-        - jupyter-book==0.12.3
+        - jupyter-book==0.15.1
         - ghp-import
         - sphinx_togglebutton
         - sphinx_design
\ No newline at end of file
diff --git a/book/requirements.txt b/book/requirements.txt
index 88932df4..a4c187b1 100644
--- a/book/requirements.txt
+++ b/book/requirements.txt
@@ -1,4 +1,4 @@
-jupyter-book==0.12.3
+jupyter-book==0.15.1
 ghp-import
 sphinx_togglebutton
 sphinx_design
\ No newline at end of file