diff --git a/bindings/python/quokka/__init__.py b/bindings/python/quokka/__init__.py
index 8146501..71b5c1b 100644
--- a/bindings/python/quokka/__init__.py
+++ b/bindings/python/quokka/__init__.py
@@ -19,8 +19,8 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
-__version__ = "1.0.5"
-__quokka_version__ = "0.0.5"
+__version__ = "0.5.1"
+__quokka_version__ = "0.5.1"
 
 import quokka.analysis
 import quokka.backends
diff --git a/setup.py b/setup.py
index 25d866a..f42be43 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
 
 setup(
     name="quokka-project",
-    version="1.0.5",
+    version="0.5.1",
     author="Alexis <dm> Challande",
     author_email="achallande@quarkslab.com",
     url="https://github.com/quarkslab/quokka",