diff --git a/pyproject.toml b/pyproject.toml
index f20e3cd6..8ab4ee65 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,6 +42,7 @@ dependencies = [
 ]
 [project.optional-dependencies]
 azure = [
+  "azure-core>=1.13",
   "azure-storage-blob>=12",
 ]
 boto3 = [