diff --git a/specs/ingestion/common/schemas/authentication.yml b/specs/ingestion/common/schemas/authentication.yml
index c24fcbe061..3393db62b0 100644
--- a/specs/ingestion/common/schemas/authentication.yml
+++ b/specs/ingestion/common/schemas/authentication.yml
@@ -60,7 +60,7 @@ AuthenticationCreateResponse:
 
 AuthenticationUpdate:
   type: object
-  description: Payload to partialy update an Authentication.
+  description: Payload to partially update an Authentication.
   additionalProperties: false
   properties:
     type:
@@ -70,7 +70,7 @@ AuthenticationUpdate:
     platform:
       $ref: '#/Platform'
     input:
-      $ref: '#/AuthInput'
+      $ref: '#/AuthInputPartial'
 
 AuthenticationUpdateResponse:
   type: object
@@ -110,6 +110,63 @@ Platform:
   description: Describe which platform the Authentication is used for.
   enum: ['bigcommerce', 'commercetools']
 
+AuthGoogleServiceAccountPartial:
+  type: object
+  description: Authentication input to connect to a Google service (e.g. BigQuery).
+  additionalProperties: false
+  properties:
+    clientEmail:
+      type: string
+      description: Email address of the Service Account.
+      example: service-account-name@project-id.iam.gserviceaccount.com
+    privateKey:
+      type: string
+      description: Private key of the Service Account.
+
+AuthBasicPartial:
+  type: object
+  description: Authentication input for Basic login with username and password.
+  additionalProperties: false
+  properties:
+    username:
+      type: string
+    password:
+      type: string
+
+AuthAPIKeyPartial:
+  type: object
+  description: Authentication input used for token credentials.
+  additionalProperties: false
+  properties:
+    key:
+      type: string
+
+AuthOAuthPartial:
+  type: object
+  description: Authentication input for OAuth login.
+  additionalProperties: false
+  properties:
+    url:
+      type: string
+      description: The OAuth endpoint URL.
+    client_id:
+      type: string
+      description: The clientID.
+    client_secret:
+      type: string
+      description: The secret.
+
+AuthAlgoliaPartial:
+  type: object
+  additionalProperties: false
+  properties:
+    appID:
+      type: string
+      description: Algolia Application ID.
+    apiKey:
+      type: string
+      description: Algolia API Key, with the correct rights to push to an index and change settings.
+
 AuthGoogleServiceAccount:
   type: object
   description: Authentication input to connect to a Google service (e.g. BigQuery).
@@ -189,3 +246,11 @@ AuthInput:
     - $ref: '#/AuthAPIKey'
     - $ref: '#/AuthOAuth'
     - $ref: '#/AuthAlgolia'
+
+AuthInputPartial:
+  oneOf:
+    - $ref: '#/AuthGoogleServiceAccountPartial'
+    - $ref: '#/AuthBasicPartial'
+    - $ref: '#/AuthAPIKeyPartial'
+    - $ref: '#/AuthOAuthPartial'
+    - $ref: '#/AuthAlgoliaPartial'