diff --git a/webapp/src/components/common/MatrixInput/index.tsx b/webapp/src/components/common/MatrixInput/index.tsx
index 2cea0abb24..3c507e6414 100644
--- a/webapp/src/components/common/MatrixInput/index.tsx
+++ b/webapp/src/components/common/MatrixInput/index.tsx
@@ -11,7 +11,7 @@ import {
   StudyMetadata,
 } from "../../../common/types";
 import useEnqueueErrorSnackbar from "../../../hooks/useEnqueueErrorSnackbar";
-import { getStudyData, importFile } from "../../../services/api/study";
+import { getStudyData } from "../../../services/api/study";
 import usePromiseWithSnackbarError from "../../../hooks/usePromiseWithSnackbarError";
 import { editMatrix, getStudyMatrixIndex } from "../../../services/api/matrix";
 import { Root, Content, Header } from "./style";
@@ -23,6 +23,7 @@ import MatrixAssignDialog from "./MatrixAssignDialog";
 import { fetchMatrixFn } from "../../App/Singlestudy/explore/Modelization/Areas/Hydro/utils";
 import SplitButton from "../buttons/SplitButton";
 import DownloadMatrixButton from "../buttons/DownloadMatrixButton.tsx";
+import { importFile } from "../../../services/api/studies/raw/index.ts";
 
 interface Props {
   study: StudyMetadata | StudyMetadata["id"];
@@ -123,7 +124,7 @@ function MatrixInput({
   };
 
   const handleImport = async (file: File) => {
-    await importFile(file, studyId, url);
+    await importFile({ file, studyId, path: url });
     reloadMatrix();
   };
 
diff --git a/webapp/src/services/api/studies/raw/index.ts b/webapp/src/services/api/studies/raw/index.ts
index 63e46dc31a..f7350f1015 100644
--- a/webapp/src/services/api/studies/raw/index.ts
+++ b/webapp/src/services/api/studies/raw/index.ts
@@ -1,13 +1,26 @@
 import client from "../../client";
-import type { DownloadMatrixParams } from "./types";
+import type { DownloadMatrixParams, ImportFileParams } from "./types";
 
 export async function downloadMatrix(params: DownloadMatrixParams) {
-  const { studyId, ...rest } = params;
+  const { studyId, ...queryParams } = params;
   const url = `v1/studies/${studyId}/raw/download`;
   const res = await client.get<Blob>(url, {
-    params: rest,
+    params: queryParams,
     responseType: "blob",
   });
 
   return res.data;
 }
+
+export async function importFile(params: ImportFileParams) {
+  const { studyId, file, onUploadProgress, ...queryParams } = params;
+  const url = `v1/studies/${studyId}/raw`;
+  const body = { file };
+  await client.putForm<void>(url, body, {
+    params: {
+      ...queryParams,
+      create_missing: queryParams.createMissing,
+    },
+    onUploadProgress,
+  });
+}
diff --git a/webapp/src/services/api/studies/raw/types.ts b/webapp/src/services/api/studies/raw/types.ts
index e524fbdc72..2c62844115 100644
--- a/webapp/src/services/api/studies/raw/types.ts
+++ b/webapp/src/services/api/studies/raw/types.ts
@@ -1,3 +1,4 @@
+import type { AxiosRequestConfig } from "axios";
 import type { StudyMetadata } from "../../../../common/types";
 
 export interface DownloadMatrixParams {
@@ -7,3 +8,11 @@ export interface DownloadMatrixParams {
   header?: boolean;
   index?: boolean;
 }
+
+export interface ImportFileParams {
+  studyId: StudyMetadata["id"];
+  path: string;
+  file: File;
+  createMissing?: boolean;
+  onUploadProgress?: AxiosRequestConfig["onUploadProgress"];
+}
diff --git a/webapp/src/services/api/study.ts b/webapp/src/services/api/study.ts
index a060bd8a16..f63404f207 100644
--- a/webapp/src/services/api/study.ts
+++ b/webapp/src/services/api/study.ts
@@ -243,37 +243,6 @@ export const importStudy = async (
   return res.data;
 };
 
-export const importFile = async (
-  file: File,
-  study: string,
-  path: string,
-  onProgress?: (progress: number) => void,
-): Promise<string> => {
-  const options: AxiosRequestConfig = {};
-  if (onProgress) {
-    options.onUploadProgress = (progressEvent): void => {
-      const percentCompleted = Math.round(
-        (progressEvent.loaded * 100) / (progressEvent.total || 1),
-      );
-      onProgress(percentCompleted);
-    };
-  }
-  const formData = new FormData();
-  formData.append("file", file);
-  const restconfig = {
-    ...options,
-    headers: {
-      "content-type": "multipart/form-data",
-    },
-  };
-  const res = await client.put(
-    `/v1/studies/${study}/raw?path=${encodeURIComponent(path)}`,
-    formData,
-    restconfig,
-  );
-  return res.data;
-};
-
 export const launchStudy = async (
   sid: string,
   options: LaunchOptions = {},