diff --git a/README.md b/README.md
index 8e7db1ac454409b66b4ced335c0629dc6d61c5be..bfe477b8b539edb1d2cf3abfa387381e9f0b463b 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,9 @@ python setup.py bdist_wheel
 Then copy your resulting wheel and install it via pip on the target system.
 
 # Changelog
+## v0.5.2
+
+* _TBA_
 
 ## v0.5.1
 
diff --git a/setup.py b/setup.py
index 23daadd68c7d4ba45c0103a1bca87dc2d697961f..9265f8c4d6d66e42e0e942dba6641d51cebba767 100644
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,7 @@ ext_modules = build([Multibuild('tempsdb', find_pyx('tempsdb'), **ext_kwargs), ]
                      **cythonize_kwargs)
 
 setup(name='tempsdb',
-      version='0.5.1',
+      version='0.5.2a1',
       packages=find_packages(include=['tempsdb', 'tempsdb.*']),
       install_requires=['satella>=2.14.24', 'ujson'],
       ext_modules=ext_modules,