diff --git a/pipeline/requirements.txt b/pipeline/requirements.txt
index 31241892..b5dce23e 100644
--- a/pipeline/requirements.txt
+++ b/pipeline/requirements.txt
@@ -1,5 +1,5 @@
 PyYAML
-ontobio==2.8.19
+ontobio==2.8.20
 click
 pyparsing==2.4.7
 antlr4-python3-runtime==4.9.3