diff --git a/src/validate/validate.schema.ts b/src/validate/validate.schema.ts
index 9379eb0e..91f5e411 100644
--- a/src/validate/validate.schema.ts
+++ b/src/validate/validate.schema.ts
@@ -135,7 +135,7 @@ export const mediaMessageSchema: JSONSchema7 = {
     mediaMessage: {
       type: 'object',
       properties: {
-        mediatype: { type: 'string', enum: ['image', 'document', 'video', 'audio'] },
+        mediatype: { type: 'string', enum: ['image', 'document', 'video', 'audio', 'sticker'] },
         media: { type: 'string' },
         fileName: { type: 'string' },
         caption: { type: 'string' },
@@ -153,7 +153,7 @@ export const mediaFileMessageSchema: JSONSchema7 = {
   properties: {
     number: { ...numberDefinition },
     caption: { type: 'string' },
-    mediatype: { type: 'string', enum: ['image', 'document', 'video', 'audio'] },
+    mediatype: { type: 'string', enum: ['image', 'document', 'video', 'audio', 'sticker'] },
     presence: { type: 'string', enum: ['composing', 'recording'] },
     delay: { type: 'string' },
   },