diff --git a/var/spack/repos/builtin/packages/nextflow/package.py b/var/spack/repos/builtin/packages/nextflow/package.py
index 715964bdc1a..96993816a87 100644
--- a/var/spack/repos/builtin/packages/nextflow/package.py
+++ b/var/spack/repos/builtin/packages/nextflow/package.py
@@ -37,6 +37,8 @@ class Nextflow(Package):
             expand=False)
     version('0.23.3', '71fb69275b6788af1c6f1165f40d362e',
             expand=False)
+    version('0.21.0', '38e5e335cb33f05ba358e1f883c8386c',
+             expand=False)
     version('0.20.1', '0e4e0e3eca1c2c97f9b4bffd944b923a',
             expand=False)
     version('0.17.3', '5df00105fb1ce6fd0ba019ae735d9617',