diff --git a/CHANGELOG.md b/CHANGELOG.md
index 935091a1..809c2eca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,11 @@
 Jupytext ChangeLog
 ==================
 
-1.16.5-dev
-----------
+1.16.5 (2024-12-08)
+-------------------
 
 **Fixed**
+- We have fixed the notebook corruption issue when using Jupytext with Jupyter-Collaboration ([#1124](https://github.com/mwouts/jupytext/issues/1124), [jupyter-collaboration #214](https://github.com/jupyterlab/jupyter-collaboration/issues/214))
 - The `rst2md` tests have been fixed by requiring `sphinx<8` ([#1266](https://github.com/mwouts/jupytext/issues/1266))
 
 **Added**
diff --git a/src/jupytext/contentsmanager.py b/src/jupytext/contentsmanager.py
index 80ee810b..dd6a9564 100644
--- a/src/jupytext/contentsmanager.py
+++ b/src/jupytext/contentsmanager.py
@@ -299,7 +299,11 @@ def read_one_file(alt_path, alt_fmt):
 
                 self.log.info(f"Reading SOURCE from {alt_path}")
                 text = self.super.get(
-                    alt_path, content=True, type="file", format=format
+                    alt_path,
+                    content=True,
+                    type="file",
+                    # Don't use the parent format, see https://github.com/mwouts/jupytext/issues/1124
+                    format=None,
                 )["content"]
                 return reads(text, fmt=alt_fmt, config=config)
 
diff --git a/src/jupytext/version.py b/src/jupytext/version.py
index 1887a67d..ef2a7f5f 100644
--- a/src/jupytext/version.py
+++ b/src/jupytext/version.py
@@ -1,3 +1,3 @@
 """Jupytext's version number"""
 
-__version__ = "1.16.4"
+__version__ = "1.16.5"