diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75fdd9ed3..5a68701ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+### 41.5.4 [#1219](https://github.com/openfisca/openfisca-core/pull/1219)
+
+#### Technical changes
+
+- Fix optional type-checks for:
+    - Commons
+    - Entities
+    - Projectors
+    - Simulations (partial)
+
 ### 41.5.3 [#1218](https://github.com/openfisca/openfisca-core/pull/1218)
 
 #### Technical changes
diff --git a/setup.py b/setup.py
index e822e138b..92971f40b 100644
--- a/setup.py
+++ b/setup.py
@@ -67,7 +67,7 @@
 
 setup(
     name="OpenFisca-Core",
-    version="41.5.3",
+    version="41.5.4",
     author="OpenFisca Team",
     author_email="contact@openfisca.org",
     classifiers=[