diff --git a/backend/src/s3/s3.service.spec.ts b/backend/src/s3/s3.service.spec.ts
index 5e9cdcc..be3281f 100644
--- a/backend/src/s3/s3.service.spec.ts
+++ b/backend/src/s3/s3.service.spec.ts
@@ -197,7 +197,7 @@ describe("S3Service", () => {
 
 		it("should use DOMAIN_NAME and PORT for localhost", () => {
 			(configService.get as jest.Mock).mockImplementation(
-				(key: string, def: any) => {
+				(key: string, def: unknown) => {
 					if (key === "API_URL") return null;
 					if (key === "DOMAIN_NAME") return "localhost";
 					if (key === "PORT") return 3000;
@@ -210,7 +210,7 @@ describe("S3Service", () => {
 
 		it("should use api.DOMAIN_NAME for production", () => {
 			(configService.get as jest.Mock).mockImplementation(
-				(key: string, def: any) => {
+				(key: string, def: unknown) => {
 					if (key === "API_URL") return null;
 					if (key === "DOMAIN_NAME") return "memegoat.fr";
 					return def;