diff --git a/pyproject.toml b/pyproject.toml
index d5462f2c..1fb454af 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,6 +30,7 @@ dependencies = [
     "click",
     "boto3",
     "ga4gh.vrs==2.0.0a13",
+    "disease-normalizer~=0.7.0",
 ]
 dynamic = ["version"]