diff --git a/backend/src/users/dto/update-avatar.dto.ts b/backend/src/users/dto/update-avatar.dto.ts
index b4c15c2..dbaeebd 100644
--- a/backend/src/users/dto/update-avatar.dto.ts
+++ b/backend/src/users/dto/update-avatar.dto.ts
@@ -1,6 +1,6 @@
-import { IsUrl } from 'class-validator';
+import { IsString } from 'class-validator';
 
 export class UpdateAvatarDto {
-  @IsUrl({}, { message: 'Picture must be a valid URL' })
+  @IsString()
   picture: string;
 }
diff --git a/backend/src/users/dto/update-username.dto.ts b/backend/src/users/dto/update-username.dto.ts
index 16b9ceb..fa6d551 100644
--- a/backend/src/users/dto/update-username.dto.ts
+++ b/backend/src/users/dto/update-username.dto.ts
@@ -1,4 +1,10 @@
-import { IsNotEmpty, IsOptional, IsString, IsUrl, Length, Matches } from 'class-validator';
+import {
+  IsNotEmpty,
+  IsOptional,
+  IsString,
+  Length,
+  Matches,
+} from 'class-validator';
 
 export class UpdateUsernameDto {
   @IsString()
@@ -9,7 +15,7 @@ export class UpdateUsernameDto {
   })
   username: string;
 
-  @IsUrl()
+  @IsString()
   @IsOptional()
   picture: string;
 }