diff --git a/pyproject.toml b/pyproject.toml
index c016579..2329dd8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,6 +6,7 @@ readme = "README.md"
 requires-python = ">=3.9"
 dependencies = [
     "gdal>=3.4",
+    "cjio>=0.9",
 ]
 
 [build-system]