diff --git a/requirements_xgboost.txt b/requirements_xgboost.txt
new file mode 100644
index 00000000..b7039914
--- /dev/null
+++ b/requirements_xgboost.txt
@@ -0,0 +1,3 @@
+# Requirements for extra 'xgboost'
+# These are the pinned lowest versions we test; setup.py relaxes them, changing them to lower bounds
+xgboost==1.7.6
diff --git a/setup.py b/setup.py
index a204fce6..50e5d999 100644
--- a/setup.py
+++ b/setup.py
@@ -19,6 +19,8 @@
     "lightgbm",
     # extra "geoanalytics"
     "networkx", "Shapely", "geopandas", "utm",
+    # extra "xgboost"
+    "xgboost",
 ]
 # upper bound: map dependency name to lowest exluded version
 DEPS_VERSION_UPPER_BOUND_EXCLUSIVE: Dict[str, str] = {}