diff --git a/setup.py b/setup.py
index 713b4ed..31f82ef 100644
--- a/setup.py
+++ b/setup.py
@@ -9,8 +9,8 @@
         "dataclasses",
         "geojson",
         "importlib_resources",
-        "lxml==3.6.0",
-        "numpy~=1.19.0",
+        "lxml==5.3.0",
+        "numpy~=1.19",
         "pystac[validation]==1.0.0rc2",
         "rasterio",
         "shapely",