diff --git a/pyproject.toml b/pyproject.toml
index ab411bf3..11ced5d8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,8 +45,8 @@ dependencies = [
 	#erddapy>=2.0.0 supports pandas>=2.0.0
 	"erddapy>=2.0.0",
 	#copernicusmarine>=1.3.4 is the latest version and the developers recommend to always use the latest version until 2.0.0 is released: https://github.com/Deltares/dfm_tools/issues/936
-	"copernicusmarine>=1.3.4",
-	"copernicusmarine<2.0.0", # TODO: remove when dfm_tools is adjusted to not-yet-released 2.0 version: https://github.com/Deltares/dfm_tools/issues/933
+	# TODO: remove when dfm_tools is adjusted to not-yet-released 2.0 version: https://github.com/Deltares/dfm_tools/issues/933
+	"copernicusmarine>=1.3.4,<2.0.0",
 	#rws-ddlpy>=0.6.0 `ddlpy.measurements_amount()` returns all amounts
 	"rws-ddlpy>=0.6.0",
 	#pooch>=1.1.0 has attribute retrieve