diff --git a/pipeline/requirements.txt b/pipeline/requirements.txt
index e9a70567..4a5ed13d 100644
--- a/pipeline/requirements.txt
+++ b/pipeline/requirements.txt
@@ -1,5 +1,5 @@
 PyYAML
-ontobio==2.9.5
+ontobio==2.9.6
 click
 pyparsing==2.4.7
 antlr4-python3-runtime==4.9.3