diff --git a/docs/environment.yml b/docs/environment.yml
index c36564dbe405369326265dd341125545d53876fe..f32515aef12ef17435882b10eeff9e4f47778eae 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -44,7 +44,7 @@ dependencies:
   - progressbar33==2.4
   - pydot==1.2.3
   - pyensembl==1.1.0
-  - pygments==2.2.0
+  - pygments==2.4.2
   - pypandoc==1.4
   - pyparsing==2.2.0
   - python-dateutil==2.6.1