diff --git a/manifest.json b/manifest.json
index f9c1114..f65f256 100644
--- a/manifest.json
+++ b/manifest.json
@@ -7,7 +7,7 @@
         "fr": "Forum de nouvelle génération, simplement",
         "de": "Forum der nächsten Generation leicht gemacht"
     },
-    "version": "1.0.0~ynh6",
+    "version": "1.1.1~ynh1",
     "url": "http://flarum.org/",
     "upstream": {
         "license": "MIT",
diff --git a/scripts/_common.sh b/scripts/_common.sh
index ed6c97c..d00fdd1 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -14,8 +14,8 @@ extra_php_dependencies="php${YNH_PHP_VERSION}-curl php${YNH_PHP_VERSION}-dom php
 
 # Version numbers
 project_version="~1.0.0"
-core_version="~1.0.0"
-ldap_version="~1.0.0-p1"
+#core_version is now retrieved from the manifest
+ldap_version="*"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/install b/scripts/install
index d817c79..53cea4a 100644
--- a/scripts/install
+++ b/scripts/install
@@ -31,6 +31,7 @@ admin_pwd=$YNH_APP_ARG_PASSWORD
 is_public=$YNH_APP_ARG_IS_PUBLIC
 language=$YNH_APP_ARG_LANGUAGE
 title=$YNH_APP_ARG_TITLE
+core_version=$(ynh_app_upstream_version)
 
 admin_mail=$(ynh_user_get_info --username=$admin --key=mail)
 
diff --git a/scripts/upgrade b/scripts/upgrade
index d10315d..8be6827 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -26,6 +26,7 @@ db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
 old_project_version=$(ynh_app_setting_get --app=$app --key=project_version)
 old_core_version=$(ynh_app_setting_get --app=$app --key=core_version)
+core_version=$(ynh_app_upstream_version)
 old_ldap_version=$(ynh_app_setting_get --app=$app --key=ldap_version)
 
 #=================================================
@@ -84,7 +85,7 @@ if [ ! -z "$bazaar_extension" ]; then
 	ynh_app_setting_delete --app=$app --key=bazaar_extension
 fi
 
-# Remove SSOwat if it exists
+# Remove SSOwat extension if it exists
 ssowat_extension=$(ynh_app_setting_get --app=$app --key=ssowat_extension)
 if [ ! -z "$ssowat_extension" ]; then
 	ynh_exec_warn_less ynh_composer_exec --phpversion=$phpversion --workdir=$final_path --commands="remove tituspijean/flarum-ext-auth-ssowat"
@@ -183,6 +184,12 @@ then
 	# Install Composer and Flarum
 	ynh_exec_warn_less ynh_install_composer --phpversion=$phpversion --workdir=$final_path
 
+	if [ ynh_compare_current_package_version --comparison lt --version 1.1.0~ynh1 ]; then
+		# Starting 1.0 (implemented for 1.1 in the package), version requirement is "*" for extensions
+		# ... except for flarum/core, but that's handled in the next block.
+		jq '.require | .[] = "*"' $final_path/composer.json
+	fi
+
 	# Perform migrations and clear cache
 	pushd $final_path
 		ynh_script_progression --message="Upgrading Flarum and its extensions..." --weight=1
@@ -210,14 +217,14 @@ fi
 case $language in
   fr)
     ynh_script_progression --message="Installing French extension..." --weight=2
-    ynh_exec_warn_less ynh_composer_exec --phpversion=$phpversion --workdir=$final_path --commands="require qiaeru/lang-french:^2.0.0"
+    ynh_exec_warn_less ynh_composer_exec --phpversion=$phpversion --workdir=$final_path --commands="require qiaeru/lang-french:*"
     activate_flarum_extension $db_name "qiaeru-lang-french"
     sql_command="UPDATE \`settings\` SET \`value\` = 'fr' WHERE \`settings\`.\`key\` = 'default_locale'"
     ynh_mysql_execute_as_root --sql="$sql_command" --database=$db_name
     ;;
   de)
     ynh_script_progression --message="Installing German extension..." --weight=2
-    ynh_exec_warn_less ynh_composer_exec --phpversion=$phpversion --workdir=$final_path --commands="require kakifrucht/flarum-de:^1.0.0"
+    ynh_exec_warn_less ynh_composer_exec --phpversion=$phpversion --workdir=$final_path --commands="require kakifrucht/flarum-de:*"
     activate_flarum_extension $db_name "kakifrucht-de"
     sql_command="UPDATE \`settings\` SET \`value\` = 'de' WHERE \`settings\`.\`key\` = 'default_locale'"
     ynh_mysql_execute_as_root --sql="$sql_command" --database=$db_name