diff --git a/python/src/METADATA.in b/python/src/METADATA.in
index 8c9d9e8..3beda73 100644
--- a/python/src/METADATA.in
+++ b/python/src/METADATA.in
@@ -1,4 +1,4 @@
-Metadata-Version: 2.0
+Metadata-Version: 1.2
 Name: @PACKAGE_NAME@
 Version: @PACKAGE_VERSION@
 Summary: Mixmod module
@@ -8,31 +8,12 @@ Author-email: users@openturns.org
 License: LGPL
 Keywords: probability reliability sensitivity metamodel
 Platform: any
-Classifier: Development Status :: 4 - Beta
+Classifier: Development Status :: 5 - Production/Stable
 Classifier: License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)
-Classifier: Operating System :: Microsoft :: Windows
-Classifier: Operating System :: MacOS :: MacOS X
-Classifier: Operating System :: POSIX :: Linux
 Classifier: Programming Language :: C++
-Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.4
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Programming Language :: Python :: 3.7
-Classifier: Programming Language :: Python :: 3.8
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Topic :: Scientific/Engineering :: Information Analysis
 Classifier: Topic :: Scientific/Engineering :: Mathematics
-Classifier: Topic :: Scientific/Engineering :: Physics
-Classifier: Topic :: Software Development :: Libraries
-Classifier: Topic :: Software Development :: Libraries :: Python Modules
-Classifier: Intended Audience :: Developers
-Classifier: Intended Audience :: Financial and Insurance Industry
-Classifier: Intended Audience :: Information Technology
 Classifier: Intended Audience :: Science/Research
-Requires-Dist: openturns (>=1.16)
+Requires-Dist: openturns (>=1.20)
 
 Mixmod module for OpenTURNS
 It provides useful features