diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index f867cfe..db203a1 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,10 @@
 # RELEASE NOTES
 
+## Version 0.5.3
+
+* Allow NAN as input
+* Poetry update
+
 ## Version 0.5.2
 
 * Support for Numpy 2.0
diff --git a/pyproject.toml b/pyproject.toml
index 8d7c03b..ebf5248 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ngboost"
-version = "0.5.2dev"
+version = "0.5.3dev"
 description = "Library for probabilistic predictions via gradient boosting."
 authors = ["Stanford ML Group <avati@cs.stanford.edu>"]
 readme = "README.md"