diff --git a/.Rbuildignore b/.Rbuildignore
index 3990073..d5d8c4a 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -12,3 +12,4 @@ CONTRIBUTING.md
 ^docs$
 ^codecov\.yml$
 ^revdep$
+^CRAN-RELEASE$
diff --git a/CRAN-RELEASE b/CRAN-RELEASE
new file mode 100644
index 0000000..d773272
--- /dev/null
+++ b/CRAN-RELEASE
@@ -0,0 +1,2 @@
+This package was submitted to CRAN on 2019-04-21.
+Once it is accepted, delete this file and tag the release (commit cf93ca7679).