diff --git a/front/pages/api/w/[wId]/data_sources/managed.ts b/front/pages/api/w/[wId]/data_sources/managed.ts
index 883276e5f18d9..bbfab032691d1 100644
--- a/front/pages/api/w/[wId]/data_sources/managed.ts
+++ b/front/pages/api/w/[wId]/data_sources/managed.ts
@@ -2,6 +2,7 @@ import type { DataSourceType, WithAPIErrorReponse } from "@dust-tt/types";
 import type { ConnectorType } from "@dust-tt/types";
 import {
   assertNever,
+  ConnectorConfigurationTypeSchema,
   DEFAULT_FREE_QDRANT_CLUSTER,
   DEFAULT_PAID_QDRANT_CLUSTER,
   EMBEDDING_CONFIG,
@@ -36,7 +37,7 @@ export const PostManagedDataSourceRequestBodySchema = t.type({
   provider: t.string,
   connectionId: t.union([t.string, t.undefined]),
   name: t.union([t.string, t.undefined]),
-  configuration: t.unknown,
+  configuration: ConnectorConfigurationTypeSchema,
 });
 
 export type PostManagedDataSourceRequestBody = t.TypeOf<
diff --git a/front/pages/w/[wId]/builder/data-sources/managed.tsx b/front/pages/w/[wId]/builder/data-sources/managed.tsx
index dd7dfacaf656d..efdd3b74a23b2 100644
--- a/front/pages/w/[wId]/builder/data-sources/managed.tsx
+++ b/front/pages/w/[wId]/builder/data-sources/managed.tsx
@@ -443,7 +443,7 @@ export default function DataSourcesView({
             provider,
             connectionId,
             name: undefined,
-            configuration: undefined,
+            configuration: null,
           } satisfies PostManagedDataSourceRequestBody),
         }
       );
diff --git a/types/src/connectors/api_handlers/connector_configuration.ts b/types/src/connectors/api_handlers/connector_configuration.ts
index 49fd698279775..d577abc192302 100644
--- a/types/src/connectors/api_handlers/connector_configuration.ts
+++ b/types/src/connectors/api_handlers/connector_configuration.ts
@@ -34,8 +34,13 @@ export type ConnectorConfigurations = {
   intercom: null;
 };
 
+export const ConnectorConfigurationTypeSchema = t.union([
+  WebCrawlerConfigurationTypeSchema,
+  t.null,
+]);
+
 export const UpdateConnectorConfigurationTypeSchema = t.type({
-  configuration: t.union([WebCrawlerConfigurationTypeSchema, t.null]),
+  configuration: ConnectorConfigurationTypeSchema,
 });
 
 export type UpdateConnectorConfigurationType = t.TypeOf<
diff --git a/types/src/connectors/api_handlers/create_connector.ts b/types/src/connectors/api_handlers/create_connector.ts
index 220559a2a58b4..b1b134fd5a440 100644
--- a/types/src/connectors/api_handlers/create_connector.ts
+++ b/types/src/connectors/api_handlers/create_connector.ts
@@ -1,11 +1,13 @@
 import * as t from "io-ts";
 
+import { ConnectorConfigurationTypeSchema } from "./connector_configuration";
+
 export const ConnectorCreateRequestBodySchema = t.type({
   workspaceAPIKey: t.string,
   dataSourceName: t.string,
   workspaceId: t.string,
   connectionId: t.string,
-  configuration: t.unknown,
+  configuration: ConnectorConfigurationTypeSchema,
 });
 
 export type ConnectorCreateRequestBody = t.TypeOf<
diff --git a/types/src/front/lib/connectors_api.ts b/types/src/front/lib/connectors_api.ts
index d41887ed8c4f4..e9f2aed1a5669 100644
--- a/types/src/front/lib/connectors_api.ts
+++ b/types/src/front/lib/connectors_api.ts
@@ -131,7 +131,7 @@ export class ConnectorsAPI {
     workspaceAPIKey: string,
     dataSourceName: string,
     connectionId: string,
-    configuration: unknown
+    configuration: ConnectorConfiguration
   ): Promise<ConnectorsAPIResponse<ConnectorType>> {
     const res = await fetch(
       `${CONNECTORS_API}/connectors/create/${encodeURIComponent(provider)}`,