diff --git a/.Rbuildignore b/.Rbuildignore
index 123a59e..5ce27a0 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -12,3 +12,4 @@
 ^cran-comments\.md$
 ^CRAN-RELEASE$
 ^revdep$
+^CRAN-SUBMISSION$
diff --git a/DESCRIPTION b/DESCRIPTION
index 6f8cd7a..2bb58f1 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: warp
 Title: Group Dates
-Version: 0.2.0.9000
+Version: 0.2.1
 Authors@R: c(
     person("Davis", "Vaughan", , "davis@posit.co", role = c("aut", "cre")),
     person("Posit Software, PBC", role = c("cph", "fnd"))
diff --git a/NEWS.md b/NEWS.md
index a3b4927..fdb5c2d 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,4 +1,4 @@
-# warp (development version)
+# warp 0.2.1
 
 * Fixed a test related to an R-devel bugfix in `as.POSIXlt()` (#36).
 
diff --git a/cran-comments.md b/cran-comments.md
index e69de29..1b7ba6e 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -0,0 +1 @@
+This is a patch release with no expected breakage.