diff --git a/core/eolearn/core/eodata.py b/core/eolearn/core/eodata.py
index d3c3868db..6d46b11da 100644
--- a/core/eolearn/core/eodata.py
+++ b/core/eolearn/core/eodata.py
@@ -175,7 +175,7 @@ class _FeatureDictGeoDf(_FeatureDict[gpd.GeoDataFrame]):
     """_FeatureDict object specialized for GeoDataFrames."""
 
     def __init__(self, feature_dict: Dict[str, gpd.GeoDataFrame], feature_type: FeatureType):
-        if not feature_type.is_vector:
+        if not feature_type.is_vector():
             raise ValueError(f"Feature type {feature_type} does not represent a vector feature.")
         super().__init__(feature_dict, feature_type)
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index f88e4b170..2ace71579 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,7 @@
 codecov
 hypothesis
 moto
-mypy
+mypy>=0.990
 nbval
 pylint>=2.14.0
 pytest>=7.0.0