diff --git a/backend/src/api/schemas/config-schema.ts b/backend/src/api/schemas/config-schema.ts
index 0b7e8aa0f..20471da69 100644
--- a/backend/src/api/schemas/config-schema.ts
+++ b/backend/src/api/schemas/config-schema.ts
@@ -77,7 +77,11 @@ const CONFIG_SCHEMA = joi.object({
   keymapLegendStyle: joi
     .string()
     .valid("lowercase", "uppercase", "blank", "dynamic"),
-  keymapLayout: joi.string().valid().max(50).token(),
+  keymapLayout: joi
+    .string()
+    .regex(/[\w-_]+/)
+    .valid()
+    .max(50),
   keymapShowTopRow: joi.string().valid("always", "layout", "never"),
   fontFamily: joi
     .string()