diff --git a/pyproject.toml b/pyproject.toml
index 8415329..9c8d7f7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,11 +49,11 @@ classifiers = [
 ]
 
 dependencies = [
-    "boto3>=1.35.0,<2.0.0",
+    "boto3>=1.40.0,<2.0.0",
     "click>=8.1.0,<9.0.0",
-    "cryptography>=42.0.0,<45.0.0",
+    "cryptography>=44.0.0,<46.0.0",
     "python-dateutil>=2.9.0,<3.0.0",
-    "requests>=2.32.0,<3.0.0",
+    "requests>=2.32.4,<3.0.0",
 ]
 
 [project.urls]
diff --git a/src/deltaglider/client_operations/stats.py b/src/deltaglider/client_operations/stats.py
index bf4c28c..74e9de5 100644
--- a/src/deltaglider/client_operations/stats.py
+++ b/src/deltaglider/client_operations/stats.py
@@ -40,7 +40,7 @@ def _first_metadata_value(metadata: dict[str, Any], *keys: str) -> str | None:
     """Return the first non-empty metadata value matching the provided keys."""
     for key in keys:
         value = metadata.get(key)
-        if value not in (None, ""):
+        if isinstance(value, str) and value:
             return value
     return None