diff --git a/schemas/manifest.v2.schema.json b/schemas/manifest.v2.schema.json
index ac38f57121..17f516f59d 100644
--- a/schemas/manifest.v2.schema.json
+++ b/schemas/manifest.v2.schema.json
@@ -149,7 +149,7 @@
             "properties": {
                 "yunohost": {
                     "type": "string",
-                    "pattern": "^>= ?[0-9]{1,2}(\\.[0-9]{1,2}){0,2}$"
+                    "pattern": "^>= ?[0-9]{1,2}(\\.[0-9]{1,2}){0,3}$"
                 },
                 "helpers_version": {
                     "type": "string",
@@ -486,7 +486,7 @@
                     "required": [],
                     "additionalProperties": false,
                     "patternProperties": {
-                        "^[a-z][a-z0-9_-]*$": {
+                        "^[a-z0-9][a-z0-9_-]*$": {
                             "type": "object",
                             "required": [],
                             "additionalProperties": false,