diff --git a/wo/cli/plugins/stack_pref.py b/wo/cli/plugins/stack_pref.py
index 624c9be..89aa3e7 100644
--- a/wo/cli/plugins/stack_pref.py
+++ b/wo/cli/plugins/stack_pref.py
@@ -32,7 +32,7 @@ def pre_pref(self, apt_packages):
         if not (WOVar.wo_distro == 'raspbian'):
             Log.info(self, "Adding repository for MySQL, please wait...")
             mysql_pref = (
-                "Package: *\nPin: origin mariadb.mirrors.ovh.net"
+                "Package: *\nPin: origin  deb.mariadb.org"
                 "\nPin-Priority: 1000\n")
             with open('/etc/apt/preferences.d/'
                       'MariaDB.pref', 'w') as mysql_pref_file:
@@ -41,7 +41,7 @@ def pre_pref(self, apt_packages):
                 mariadb_ver = self.app.config.get(
                     'mariadb', 'release')
                 wo_mysql_repo_conf = ("deb [signed-by=/etc/apt/keyrings/mariadb-keyring.pgp] "
-                                      "http://mariadb.mirrors.ovh.net/MariaDB/repo/"
+                                      "https://deb.mariadb.org/"
                                       f"{mariadb_ver}/{WOVar.wo_distro} {WOVar.wo_platform_codename} main")
             else:
                 wo_mysql_repo_conf = WOVar.wo_mysql_repo
diff --git a/wo/core/apt_repo.py b/wo/core/apt_repo.py
index 5abb9ff..14a31b9 100644
--- a/wo/core/apt_repo.py
+++ b/wo/core/apt_repo.py
@@ -30,14 +30,14 @@ class WORepo():
             try:
                 if not os.path.isfile(repo_file_path):
                     with open(repo_file_path,
-                              encoding='utf-8', mode='a') as repofile:
+                              encoding='utf-8', mode='w') as repofile:
                         repofile.write(repo_url)
                         repofile.write('\n')
                         repofile.close()
                 elif repo_url not in open(repo_file_path,
                                           encoding='utf-8').read():
                     with open(repo_file_path,
-                              encoding='utf-8', mode='a') as repofile:
+                              encoding='utf-8', mode='w') as repofile:
                         repofile.write(repo_url)
                         repofile.write('\n')
                         repofile.close()
diff --git a/wo/core/variables.py b/wo/core/variables.py
index 183f2cc..5f25cec 100644
--- a/wo/core/variables.py
+++ b/wo/core/variables.py
@@ -188,7 +188,7 @@ class WOVar():
 
     # APT repositories
     wo_mysql_repo = ("deb [signed-by=/etc/apt/keyrings/mariadb-keyring.pgp] "
-                     "http://mariadb.mirrors.ovh.net/MariaDB/repo/"
+                     "https://deb.mariadb.org/"
                      f"{mariadb_ver}/{wo_distro} {wo_platform_codename} main")
     mariadb_repo_key = "https://mariadb.org/mariadb_release_signing_key.pgp"
     if wo_distro == 'ubuntu':