diff --git a/conf/add_sso_conf.py b/conf/add_sso_conf.py
index 49a23e7..4595548 100644
--- a/conf/add_sso_conf.py
+++ b/conf/add_sso_conf.py
@@ -1,11 +1,11 @@
 import json
 
-with open("/etc/ssowat/conf.json.persistent", "r") as jsonFile:
+with open("/etc/ssowat/conf.json.persistent", "r", encoding='utf-8') as jsonFile:
     data = json.load(jsonFile)
     if "skipped_urls" in data:
         data["skipped_urls"].append("/_matrix")
     else:
         data["skipped_urls"] = ["/_matrix"]
 
-with open("/etc/ssowat/conf.json.persistent", "w") as jsonFile:
+with open("/etc/ssowat/conf.json.persistent", "w", encoding='utf-8') as jsonFile:
     jsonFile.write(json.dumps(data, indent=4, sort_keys=True))
\ No newline at end of file
diff --git a/conf/remove_sso_conf.py b/conf/remove_sso_conf.py
index effdcca..46c5a86 100644
--- a/conf/remove_sso_conf.py
+++ b/conf/remove_sso_conf.py
@@ -1,8 +1,8 @@
 import json
 
-with open("/etc/ssowat/conf.json.persistent", "r") as jsonFile:
+with open("/etc/ssowat/conf.json.persistent", "r", encoding='utf-8') as jsonFile:
     data = json.load(jsonFile)
     data["skipped_urls"].remove("/_matrix")
 
-with open("/etc/ssowat/conf.json.persistent", "w") as jsonFile:
+with open("/etc/ssowat/conf.json.persistent", "w", encoding='utf-8') as jsonFile:
     jsonFile.write(json.dumps(data, indent=4, sort_keys=True))
\ No newline at end of file
diff --git a/scripts/experimental_helper.sh b/scripts/experimental_helper.sh
index dd24fb2..d2f8c12 100644
--- a/scripts/experimental_helper.sh
+++ b/scripts/experimental_helper.sh
@@ -6,7 +6,7 @@
 ynh_read_manifest () {
 	manifest="$1"
 	key="$2"
-	python3 -c "import sys, json;print(json.load(open('$manifest'))['$key'])"
+	python3 -c "import sys, json;print(json.load(open('$manifest', encoding='utf-8'))['$key'])"
 }
 
 # Read the upstream version from the manifest 
diff --git a/scripts/install b/scripts/install
index b7ea3a0..4fae671 100644
--- a/scripts/install
+++ b/scripts/install
@@ -269,7 +269,7 @@ ynh_use_logrotate /var/log/matrix-$app
 # The script "add_sso_conf.py" will just add en entry for the path "/_matrix" in the sso conf.json.persistent file in the cathegory "skipped_urls".
 cp ../conf/add_sso_conf.py $final_path
 cp ../conf/remove_sso_conf.py $final_path
-python $final_path/add_sso_conf.py || ynh_die "Your file /etc/ssowat/conf.json.persistent don't respect the json synaxe. Please fix the synaxe to install this app. For more information see here : https://github.com/YunoHost-Apps/synapse_ynh/issues/32"
+python3 $final_path/add_sso_conf.py || ynh_die "Your file /etc/ssowat/conf.json.persistent don't respect the json synaxe. Please fix the synaxe to install this app. For more information see here : https://github.com/YunoHost-Apps/synapse_ynh/issues/32"
 
 #=================================================
 # SECURE FILES AND DIRECTORIES
diff --git a/scripts/remove b/scripts/remove
index 9261541..e3cbf9a 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -64,7 +64,7 @@ closeport $turnserver_alt_tls_port
 #=================================================
 
 # Remove the skipped url
-python $final_path/remove_sso_conf.py
+python3 $final_path/remove_sso_conf.py
 
 #=================================================
 # REMOVE DEPENDENCIES
diff --git a/scripts/restore b/scripts/restore
index 7f17c46..cf0f468 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -88,7 +88,7 @@ yunohost firewall allow Both $turnserver_alt_tls_port > /dev/null 2>&1
 
 # Open access to server without a button the home
 # The script "add_sso_conf.py" will just add en entry for the path "/_matrix" in the sso conf.json.persistent file in the cathegory "skipped_urls".
-python $final_path/add_sso_conf.py || ynh_die "Your file /etc/ssowat/conf.json.persistent don't respect the json synaxe. Please fix the synaxe to install this app. For more information see here : https://github.com/YunoHost-Apps/synapse_ynh/issues/32"
+python3 $final_path/add_sso_conf.py || ynh_die "Your file /etc/ssowat/conf.json.persistent don't respect the json synaxe. Please fix the synaxe to install this app. For more information see here : https://github.com/YunoHost-Apps/synapse_ynh/issues/32"
 
 #=================================================
 # RESTORE THE POSTGRESQL DATABASE
diff --git a/scripts/upgrade b/scripts/upgrade
index 9d552ce..abf33c7 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -240,7 +240,7 @@ then
 
     cp ../conf/add_sso_conf.py $final_path
     cp ../conf/remove_sso_conf.py $final_path
-    python $final_path/add_sso_conf.py || echo "Error while sso config, please add '/_matrix' in /etc/ssowat/conf.json.persistent"
+    python3 $final_path/add_sso_conf.py || echo "Error while sso config, please add '/_matrix' in /etc/ssowat/conf.json.persistent"
 
     #=================================================
     # CREATE DEDICATED USER