diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..810cc7f
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,21 @@
+# v0.4.0 (20 July 2020)
+- Major robustness improvements and new functionality (possibility to pack while using the repository, tested on all platforms)
+- Not deleting loose files when packing; now there is a `clean_storage()` function to do it afterwards, as a maintenance operation
+- Backward-incompatible change to the Container format (now it expects a `duplicates` folder, so old repositories do not work out of the box)
+- Added various functionality to delete objects, validate the packs, list all objects, possibility to seek() into returned objects
+- Added continuous-integation benchmarks
+- Various bugfixes
+
+# v0.3.0 (22 June 2020)
+- Changed the logic of packing: now packs are not determined anymore from the first few characters of the UUID/hash, but they are sequential integers with capped max size
+- Complete major rewrite of the library, where now objects are deduplicated and use a SHA256 hash to be identified. This is a backward-incompatible version, but provides much higher robustness and features, making it almost production ready (only a few useful functions need still to be implemented to facilitate repository management, like the option to perform a full repack of a repository.
+
+# v0.2.1 (13 April 2020)
+- Improving testing and continuous integration, badges, and homepage
+
+# v0.2.0 (10 April 2020)
+- Rename of the project and implementation of a number of functions
+
+# v0.1.0 (1 April 2020)
+- This is the very first version. Uses random UUIDs to identify objects.
+
diff --git a/disk_objectstore/container.py b/disk_objectstore/container.py
index 09ce785..481711f 100644
--- a/disk_objectstore/container.py
+++ b/disk_objectstore/container.py
@@ -1457,7 +1457,7 @@ def clean_storage(self):  # pylint: disable=too-many-branches
                 # I just ignore, I will remove it in a future call of this method.
                 pass
 
-    def export(self, hashkeys, other_container, compress=True, target_memory_bytes=104857600):
+    def export(self, hashkeys, other_container, compress=False, target_memory_bytes=104857600):
         """Export the specified hashkeys to a new container (must be already initialised).
 
         :param hashkeys: an iterable of hash keys.
diff --git a/setup.py b/setup.py
index c35f67d..ffba7ec 100644
--- a/setup.py
+++ b/setup.py
@@ -52,8 +52,7 @@
         'Programming Language :: Python :: 3', 'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6', 'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8', 'License :: OSI Approved :: MIT License',
-        'Operating System :: OS Independent', 'Operating System :: MacOS :: MacOS X',
-        'Operating System :: Microsoft :: Windows', 'Operating System :: POSIX :: Linux',
-        'Topic :: Software Development :: Libraries :: Python Modules'
+        'Operating System :: MacOS :: MacOS X', 'Operating System :: Microsoft :: Windows',
+        'Operating System :: POSIX :: Linux', 'Topic :: Software Development :: Libraries :: Python Modules'
     ],
 )