diff --git a/docs/environment.yml b/docs/environment.yml
index 926d833bc..adb37f702 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -19,3 +19,4 @@ dependencies:
     - sphinx==1.5.1
     - pysam==0.9.0
     - RDFLib==4.2.1
+    - peewee==2.8.5