diff --git a/DESCRIPTION b/DESCRIPTION
index da1e32fc..28f72143 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -2,7 +2,7 @@ Type: Package
 Package: nlmixr2est
 Title: Nonlinear Mixed Effects Models in Population PK/PD, Estimation
     Routines
-Version: 2.2.0.9000
+Version: 2.2.1
 Authors@R: c(
     person("Matthew", "Fidler", , "matthew.fidler@gmail.com", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0001-8538-6691")),