diff --git a/scripts/_common.sh b/scripts/_common.sh
index 7e7b82d..b754169 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -53,7 +53,7 @@ install_sources() {
         fi
         
         chown $synapse_user:root -R $final_path
-        sudo -u $synapse_user env PATH=$PATH pip3 install --upgrade 'cryptography>=3.4.7' 'pyOpenSSL>=22.1.0'
+        sudo -u $synapse_user env PATH=$PATH pip3 install --upgrade 'cryptography>=3.4.7' 'pyOpenSSL>=22.1.0' 'attrs>=22.1.0'
         pip3 install --upgrade cffi ndg-httpsclient psycopg2 lxml jinja2
         # Fix issue https://github.com/YunoHost-Apps/synapse_ynh/issues/248
         pip3 install --upgrade 'Twisted>=21' 'treq>=21.1.0' matrix-synapse==$upstream_version matrix-synapse-ldap3