diff --git a/setup.cfg b/setup.cfg
index ee38985..509f8ca 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -42,7 +42,6 @@ install_requires =
     cdsapi>=0.7.3
     repurpose>=0.13
     pygeogrids
-    cdo
 
 # The usage of test_requires is discouraged, see `Dependency Management` docs
 # tests_require = pytest; pytest-cov