diff --git a/backend/src/Squidex.Infrastructure.Amazon/Assets/AmazonS3AssetStore.cs b/backend/src/Squidex.Infrastructure.Amazon/Assets/AmazonS3AssetStore.cs
index 52dfe7cb2..5ad4639c5 100644
--- a/backend/src/Squidex.Infrastructure.Amazon/Assets/AmazonS3AssetStore.cs
+++ b/backend/src/Squidex.Infrastructure.Amazon/Assets/AmazonS3AssetStore.cs
@@ -19,6 +19,7 @@ namespace Squidex.Infrastructure.Assets
     public sealed class AmazonS3AssetStore : DisposableObjectBase, IAssetStore, IInitializable
     {
         private const int BufferSize = 81920;
+        private readonly string? serviceUrl;
         private readonly string accessKey;
         private readonly string secretKey;
         private readonly string bucketName;
@@ -27,12 +28,13 @@ namespace Squidex.Infrastructure.Assets
         private TransferUtility transferUtility;
         private IAmazonS3 s3Client;
 
-        public AmazonS3AssetStore(string regionName, string bucketName, string? bucketFolder, string accessKey, string secretKey)
+        public AmazonS3AssetStore(string? serviceUrl, string? regionName, string bucketName, string? bucketFolder, string accessKey, string secretKey)
         {
             Guard.NotNullOrEmpty(bucketName);
             Guard.NotNullOrEmpty(accessKey);
             Guard.NotNullOrEmpty(secretKey);
 
+            this.serviceUrl = serviceUrl;
             this.bucketName = bucketName;
             this.bucketFolder = bucketFolder;
             this.accessKey = accessKey;
@@ -55,10 +57,20 @@ namespace Squidex.Infrastructure.Assets
         {
             try
             {
-                s3Client = new AmazonS3Client(
-                    accessKey,
-                    secretKey,
-                    bucketRegion);
+                if (!string.IsNullOrWhiteSpace(serviceUrl))
+                {
+                    s3Client = new AmazonS3Client(
+                        accessKey,
+                        secretKey,
+                        new AmazonS3Config { ServiceURL = serviceUrl });
+                }
+                else
+                {
+                    s3Client = new AmazonS3Client(
+                        accessKey,
+                        secretKey,
+                        bucketRegion);
+                }
 
                 transferUtility = new TransferUtility(s3Client);
 
diff --git a/backend/src/Squidex/Config/Domain/AssetServices.cs b/backend/src/Squidex/Config/Domain/AssetServices.cs
index 5054c6103..90d52acdd 100644
--- a/backend/src/Squidex/Config/Domain/AssetServices.cs
+++ b/backend/src/Squidex/Config/Domain/AssetServices.cs
@@ -88,7 +88,8 @@ namespace Squidex.Config.Domain
                 },
                 ["AmazonS3"] = () =>
                 {
-                    var regionName = config.GetRequiredValue("assetStore:amazonS3:regionName");
+                    var serviceUrl = config.GetOptionalValue<string>("assetStore:amazonS3:serviceUrl");
+                    var regionName = config.GetOptionalValue<string>("assetStore:amazonS3:regionName");
 
                     var bucketName = config.GetRequiredValue("assetStore:amazonS3:bucket");
                     var bucketFolder = config.GetRequiredValue("assetStore:amazonS3:bucketFolder");
@@ -96,7 +97,7 @@ namespace Squidex.Config.Domain
                     var accessKey = config.GetRequiredValue("assetStore:amazonS3:accessKey");
                     var secretKey = config.GetRequiredValue("assetStore:amazonS3:secretKey");
 
-                    services.AddSingletonAs(c => new AmazonS3AssetStore(regionName, bucketName, bucketFolder, accessKey, secretKey))
+                    services.AddSingletonAs(c => new AmazonS3AssetStore(serviceUrl, regionName, bucketName, bucketFolder, accessKey, secretKey))
                         .As<IAssetStore>();
                 },
                 ["MongoDb"] = () =>
diff --git a/backend/src/Squidex/appsettings.json b/backend/src/Squidex/appsettings.json
index ae7b38868..e5e64e2a6 100644
--- a/backend/src/Squidex/appsettings.json
+++ b/backend/src/Squidex/appsettings.json
@@ -284,6 +284,12 @@
       "connectionString": "UseDevelopmentStorage=true"
     },
     "AmazonS3": {
+
+      /*
+       * The url of the S3 API service. Leave it empty if using the one provided by Amazon
+       */
+      "serviceUrl": "", 
+
       /*
        * The name of your bucket.
        */
diff --git a/backend/tests/Squidex.Infrastructure.Tests/Assets/AmazonS3AssetStoreFixture.cs b/backend/tests/Squidex.Infrastructure.Tests/Assets/AmazonS3AssetStoreFixture.cs
index 3e3fcec04..22dc6233f 100644
--- a/backend/tests/Squidex.Infrastructure.Tests/Assets/AmazonS3AssetStoreFixture.cs
+++ b/backend/tests/Squidex.Infrastructure.Tests/Assets/AmazonS3AssetStoreFixture.cs
@@ -13,7 +13,7 @@ namespace Squidex.Infrastructure.Assets
 
         public AmazonS3AssetStoreFixture()
         {
-            AssetStore = new AmazonS3AssetStore("eu-central-1", "squidex-test", "squidex-assets", "secret", "secret");
+            AssetStore = new AmazonS3AssetStore(null, "eu-central-1", "squidex-test", "squidex-assets", "secret", "secret");
             AssetStore.InitializeAsync().Wait();
         }
     }
diff --git a/backend/tests/Squidex.Infrastructure.Tests/Assets/AmazonS3AssetStoreTests.cs b/backend/tests/Squidex.Infrastructure.Tests/Assets/AmazonS3AssetStoreTests.cs
index 454f4d1e5..b1fde1d1a 100644
--- a/backend/tests/Squidex.Infrastructure.Tests/Assets/AmazonS3AssetStoreTests.cs
+++ b/backend/tests/Squidex.Infrastructure.Tests/Assets/AmazonS3AssetStoreTests.cs
@@ -28,7 +28,7 @@ namespace Squidex.Infrastructure.Assets
         [Fact]
         public async Task Should_throw_exception_for_invalid_config()
         {
-            var sut = new AmazonS3AssetStore("invalid", "invalid", null, "invalid", "invalid");
+            var sut = new AmazonS3AssetStore(null, "invalid", "invalid", null, "invalid", "invalid");
 
             await Assert.ThrowsAsync<ConfigurationException>(() => sut.InitializeAsync());
         }