diff --git a/pyproject.toml b/pyproject.toml
index 30232528ed08106f39b34215c978543a38720f4f..e96d9a8ecb3e1a2e223d0c749873617bfe240715 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ requires = [
     "geopandas>= 0.8",
     "pyyaml>= 5.3",
     "sqlalchemy< 2.0",
+    "sqlitedict >= 2.1"
 ]
 requires-python=">= 3.6"