diff --git a/rio_tiler/colormap.py b/rio_tiler/colormap.py
index c9e0f768..b0f21239 100644
--- a/rio_tiler/colormap.py
+++ b/rio_tiler/colormap.py
@@ -16,16 +16,17 @@
 )
 
 try:
-    import importlib.resources as pkg_resources
+    from importlib.resources import files as resources_files  # type: ignore
 except ImportError:
-    # Try backported to PY<37 `importlib_resources`.
-    import importlib_resources as pkg_resources  # type: ignore
+    # Try backported to PY<39 `importlib_resources`.
+    from importlib_resources import files as resources_files  # type: ignore
 
 
 EMPTY_COLORMAP: Dict = {i: [0, 0, 0, 0] for i in range(256)}
 
-with pkg_resources.path(__package__, "cmap_data") as p:
-    DEFAULT_CMAPS_FILES = {f.stem: str(f) for f in p.glob("*.npy")}
+DEFAULT_CMAPS_FILES = {
+    f.stem: str(f) for f in (resources_files(__package__) / "cmap_data").glob("*.npy")
+}
 
 USER_CMAPS_DIR = os.environ.get("COLORMAP_DIRECTORY", None)
 if USER_CMAPS_DIR:
diff --git a/setup.py b/setup.py
index 3991b551..bcc763d2 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
     "rasterio>=1.1.7",
     "requests",
     "rio-color",
-    "importlib_resources;python_version<'3.7'",
+    "importlib_resources>=1.1.0;python_version<'3.9'",
 ]
 
 extra_reqs = {