diff --git a/pyproject.toml b/pyproject.toml
index 6d80e45..468e3fd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,6 +17,7 @@ classifiers = [
 ]
 requires-python = ">=3.7"
 dependencies = [
+    "copernicusmarine",
     "django-geo-spaas",
     "django",
     "feedparser",