diff --git a/src/@types/MetaData.d.ts b/src/@types/MetaData.d.ts
index f49368b38..d3a474282 100644
--- a/src/@types/MetaData.d.ts
+++ b/src/@types/MetaData.d.ts
@@ -25,8 +25,8 @@ export interface MetadataPublishForm {
   author: string
   license: string
   price: {
-    cost: string
-    tokensToMint: string
+    cost: number
+    tokensToMint: number
   }
   access: 'Download' | 'Compute' | string
   termsAndConditions: boolean
diff --git a/src/components/pages/Publish/validation.ts b/src/components/pages/Publish/validation.ts
index e2c948855..639afd984 100644
--- a/src/components/pages/Publish/validation.ts
+++ b/src/components/pages/Publish/validation.ts
@@ -7,8 +7,8 @@ export const validationSchema = Yup.object().shape<MetadataPublishForm>({
   name: Yup.string().required('Required'),
   author: Yup.string().required('Required'),
   price: Yup.object().shape({
-    cost: Yup.string().required('Required'),
-    tokensToMint: Yup.string().required('Required')
+    cost: Yup.number().required('Required'),
+    tokensToMint: Yup.number().required('Required')
   }),
   files: Yup.array<FileMetadata>().required('Required').nullable(),
   description: Yup.string().required('Required'),
@@ -28,8 +28,8 @@ export const initialValues: MetadataPublishForm = {
   name: '',
   author: '',
   price: {
-    cost: '',
-    tokensToMint: ''
+    cost: 0,
+    tokensToMint: null
   },
   files: '',
   description: '',