diff --git a/requirements.txt b/requirements.txt
index 262ab4e..da16db7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ python-dotenv>=1.2.1
 # imports rdflib + rdflib.namespace for OWL class hierarchy parsing).
 # Without it, pytest collection of tests/test_ingest_fibo.py fails with
 # ModuleNotFoundError, which silently breaks every PR's CI.
-rdflib>=7.0.0
+rdflib>=7.6.0
 sentry-sdk[fastapi]>=2.58.0
 slowapi>=0.1.9
 stripe>=9.0.0