diff --git a/requirements.txt b/requirements.txt
index b996262..28c9cfc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1 @@
-pyam-iamc>=1.0  # the pyam package is released on pypi.org under this name
-nomenclature-iamc >= 0.18.1
+nomenclature-iamc >= 0.19.0  # use the latest release on PyPI