diff --git a/ir_sim/version.py b/ir_sim/version.py
index 4f33a3a..a1aba1e 100644
--- a/ir_sim/version.py
+++ b/ir_sim/version.py
@@ -1,2 +1,2 @@
-version = "2.1.2"
+version = "2.1.3"
 __version__ = version
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index a8ea29d..7683df4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "ir_sim"
-version = "2.1.2"
+version = "2.1.3"
 authors = [
   { name="Han Ruihua", email="hanrh@connect.hku.hk" },
 ]