diff --git a/pyproject.toml b/pyproject.toml
index fc02eb1b774b8ad73262f8ec0b051233a7aad3e2..f8e685d12cf5086659cb0d4c37bcae2797a60a16 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "psimpy"
-version = "0.1.0"
+version = "0.1.1"
 description = "Predictive and probabilistic simulation tools."
 authors = ["Hu Zhao"]
 license = "MIT"