diff --git a/manifest.toml b/manifest.toml
index 694cb62..3e3eeae 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -5,7 +5,7 @@ name = "Outline"
 description.en = "Wiki and knowledge base for teams"
 description.fr = "Wiki et base de connaissances pour les équipes"
 
-version = "0.75.0~ynh1"
+version = "0.75.0~ynh2"
 
 maintainers = ["Raoul de Limezy"]
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 5db2220..ed2ce02 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -63,6 +63,23 @@ else
 	ynh_script_progression --message="No migration to be done"
 fi
 
+#=======================================================
+# MIGRATE DEFAULT LANGUAGE ENV PARAMETER
+#=======================================================
+
+if ynh_compare_current_package_version --comparison le --version 0.75.0~ynh1
+then
+	ynh_script_progression --message="Migrating default language variable"
+	if [ "$language" == "fr" ]
+	then
+		$language = "fr_FR"
+	else
+		$language = "en_US"
+	fi
+else
+	ynh_script_progression --message="No default language migration to be done"
+fi
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================