diff --git a/pyproject.toml b/pyproject.toml
index 5cbfcca..1509bc8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,8 @@ classifiers = [
 ]
 keywords = ["nosql", "mongo", "aggregation", "pymongo", "pandas", "pydantic"]
 dependencies = [
-    "pydantic >= 1.8.0"
+    "pydantic >= 1.8.0",
+    "pyhumps >= 3.0.2"
 ]
 requires-python = ">=3.10"