diff --git a/pandasaurus_cxg/graph_generator/graph_namespaces.py b/pandasaurus_cxg/graph_generator/graph_namespaces.py
index b18ce94..2518489 100644
--- a/pandasaurus_cxg/graph_generator/graph_namespaces.py
+++ b/pandasaurus_cxg/graph_generator/graph_namespaces.py
@@ -5,4 +5,5 @@
     "MONDO": "http://purl.obolibrary.org/obo/MONDO_",
     "HsapDv": "http://purl.obolibrary.org/obo/HsapDv_",
     "NCBITaxon": "http://purl.obolibrary.org/obo/NCBITaxon_",
+    "EFO": "http://www.ebi.ac.uk/efo/EFO_",
 }
diff --git a/pyproject.toml b/pyproject.toml
index b9c92d2..49d9ae8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pandasaurus-cxg"
-version = "0.1.21"
+version = "0.1.22"
 description = "Ontology enrichment tool for CxG standard AnnData files."
 authors = ["Ugur Bayindir <ugur@ebi.ac.uk>"]
 license = "http://www.apache.org/licenses/LICENSE-2.0"