diff --git a/setup.cfg b/setup.cfg
index fdf5c93..64d1132 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -23,7 +23,7 @@ platforms = any
 # Add here all kinds of additional classifiers as defined under
 # https://pypi.org/classifiers/
 classifiers =
-    Development Status :: Alpha
+    Development Status :: 3 - Alpha
     Intended Audience :: Science/Research
     License :: OSI Approved :: Apache Software License
     Natural Language :: English