diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0eb3c9..906a850 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 <!--next-version-placeholder-->
 
+## v0.1.40 (2023-12-08)
+
+### Fix
+
+* Real_time_factor ([`3667b69`](https://github.com/eager-dev/eagerx/commit/3667b6945da598a0f02a1da437976677ab909aef))
+
 ## v0.1.39 (2023-09-04)
 
 ### Fix
diff --git a/eagerx/__init__.py b/eagerx/__init__.py
index 3aeb02c..a0f4e5d 100644
--- a/eagerx/__init__.py
+++ b/eagerx/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.1.39"
+__version__ = "0.1.40"
 
 from eagerx.core.space import Space
 from eagerx.core.constants import (  # noqa: F401  # pylint: disable=unused-import
diff --git a/pyproject.toml b/pyproject.toml
index 54d4c6c..28e57e4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "eagerx"
-version = "0.1.39"
+version = "0.1.40"
 description = "Engine Angostic Graph Environments for Robotics"
 authors = ["Bas van der Heijden <d.s.vanderheijden@tudelft.nl>", "Jelle Luijkx <j.d.luijkx@tudelft.nl>"]
 license = "Apache2.0"