diff --git a/src/isnd/Controllers/Packages/PackagesController.GetPackage.cs b/src/isnd/Controllers/Packages/PackagesController.GetPackage.cs
index 5847662..6c18f77 100644
--- a/src/isnd/Controllers/Packages/PackagesController.GetPackage.cs
+++ b/src/isnd/Controllers/Packages/PackagesController.GetPackage.cs
@@ -29,6 +29,9 @@ namespace isnd.Controllers
                 s=>s.Name==version);
             var pkgNameSpec=$"{id}-{version}.{Constants.PacketFileExtension}";
 
+            if (pkgVersionDirInfo == null)
+                return NotFound();
+
             FileInfo pkgFileInfo = pkgVersionDirInfo.GetFiles()
             .FirstOrDefault(p=>string.Compare(p.Name,pkgNameSpec,
              System.StringComparison.InvariantCultureIgnoreCase)==0);
diff --git a/src/isnd/Controllers/Packages/PackagesController.GetVersions.cs b/src/isnd/Controllers/Packages/PackagesController.GetVersions.cs
index f766b50..386689b 100644
--- a/src/isnd/Controllers/Packages/PackagesController.GetVersions.cs
+++ b/src/isnd/Controllers/Packages/PackagesController.GetVersions.cs
@@ -12,7 +12,7 @@ namespace isnd.Controllers
         public IActionResult GetVersions(
             string id,
             string version,
-            bool prerelease = false,
+            bool prerelease = true,
             string packageType = null,
             int skip = 0,
             int take = 50)
diff --git a/src/isnd/Controllers/Packages/PackagesController.Put.cs b/src/isnd/Controllers/Packages/PackagesController.Put.cs
index 5c0aaa4..c13bd38 100644
--- a/src/isnd/Controllers/Packages/PackagesController.Put.cs
+++ b/src/isnd/Controllers/Packages/PackagesController.Put.cs
@@ -8,6 +8,7 @@ using Microsoft.Extensions.Logging;
 using isnd.Entities;
 using Microsoft.AspNetCore.Http;
 using isn.abst;
+using System.IO;
 
 namespace isnd.Controllers
 {
@@ -35,8 +36,19 @@ namespace isnd.Controllers
                 }
                 foreach (IFormFile file in Request.Form.Files)
                 {
-                    var version = await packageManager.PutPackageAsync(file.OpenReadStream(), dbApiKey.UserId);
-                    logger.LogInformation($"new package : {version.PackageId} {version.NugetLink}");
+                    FileInfo inputFileInfo = new FileInfo(file.Name);
+                    switch (inputFileInfo.Extension)
+                    {
+                        case "nupkg":
+                        case "nupkgs":
+                            var libVersion = await packageManager.PutPackageAsync(inputFileInfo.Extension, file.OpenReadStream(), dbApiKey.UserId);
+                            logger.LogInformation($"new package : {libVersion.PackageId} {libVersion.NugetLink}");
+                            break;
+                        default:
+                             logger.LogInformation($"file extension is not supported : {inputFileInfo.Extension}");
+                            break;
+                    }
+                  
                 }
                 return Ok();
             }
diff --git a/src/isnd/Controllers/Packages/PackagesController.Search.cs b/src/isnd/Controllers/Packages/PackagesController.Search.cs
index 9406689..83e3a75 100644
--- a/src/isnd/Controllers/Packages/PackagesController.Search.cs
+++ b/src/isnd/Controllers/Packages/PackagesController.Search.cs
@@ -18,7 +18,7 @@ namespace isnd.Controllers
            string q=null, 
            int skip=0,
            int take=25,
-           bool prerelease=false, 
+           bool prerelease=true, 
            string semVerLevel = "2.0.0",
            string packageType = "Dependency")
         {
diff --git a/src/isnd/Interfaces/IPackageManager.cs b/src/isnd/Interfaces/IPackageManager.cs
index fc79c6a..36ec1e8 100644
--- a/src/isnd/Interfaces/IPackageManager.cs
+++ b/src/isnd/Interfaces/IPackageManager.cs
@@ -30,7 +30,7 @@ namespace isnd.Interfaces
 
         Task<PackageSearchResult> SearchPackageAsync(PackageRegistrationQuery query);
 
-        Task<PackageVersion> PutPackageAsync(Stream packageStream, string ownerId);
+        Task<PackageVersion> PutPackageAsync(string fileExtension, Stream packageStream, string ownerId);
     }
 
 }
\ No newline at end of file
diff --git a/src/isnd/Services/PackageManager.cs b/src/isnd/Services/PackageManager.cs
index 6b2a55c..8953266 100644
--- a/src/isnd/Services/PackageManager.cs
+++ b/src/isnd/Services/PackageManager.cs
@@ -396,7 +396,7 @@ namespace isnd.Services
             return new PackageSearchResult(packages, apiBase, count);
         }
 
-        public async Task<PackageVersion> PutPackageAsync(Stream packageStream, string ownerId)
+        public async Task<PackageVersion> PutPackageAsync(string fileExtension, Stream packageStream, string ownerId)
         {
             PackageVersion version = null;
             using (packageStream)
@@ -441,7 +441,7 @@ namespace isnd.Services
                     string packageIdPath = Path.Combine(isndSettings.PackagesRootDir,
                         pkgId);
                     pkgPath = Path.Combine(packageIdPath, nugetVersion.ToFullString());
-                    string name = $"{pkgId}-{nugetVersion}." + Constants.PacketFileExtension;
+                    string name = $"{pkgId}-{nugetVersion}." + fileExtension;
                     fullPath = Path.Combine(pkgPath, name);
 
                     var authors = xMetaElements.FirstOrDefault(x => x.Name.LocalName == "authors")?.Value;
diff --git a/src/isnd/Startup.cs b/src/isnd/Startup.cs
index 6aeec10..3dce29e 100644
--- a/src/isnd/Startup.cs
+++ b/src/isnd/Startup.cs
@@ -52,7 +52,10 @@ namespace isnd
             .Configure<AdminStartupList>(adminStartupListConf)
             .Configure<MigrationsEndPointOptions>(o => o.Path = "~/migrate")
             .AddDbContext<ApplicationDbContext>(options =>
-                options.UseNpgsql(Configuration.GetConnectionString("DefaultConnection")))
+                options.UseNpgsql(Configuration.GetConnectionString("DefaultConnection"))
+                .ConfigureWarnings(w => w.Ignore(RelationalEventId.PendingModelChangesWarning))
+            .EnableDetailedErrors()
+                )
             .AddIdentity<ApplicationUser, IdentityRole>()
             .AddRoles<IdentityRole>()
             .AddEntityFrameworkStores<ApplicationDbContext>(
@@ -96,7 +99,7 @@ namespace isnd
                s.SerializerSettings.ReferenceResolverProvider = () => new NSJWebApiReferenceResolver();
            })
            .AddXmlSerializerFormatters();
-           #if SWAGGER
+#if SWAGGER
             services.AddSwaggerGen(options =>
             {
                 options.SwaggerDoc("v1", new OpenApiInfo
@@ -119,7 +122,7 @@ namespace isnd
                 var xmlFilename = $"{typeof(Startup).Assembly.GetName().Name}.xml";
                 options.IncludeXmlComments(Path.Combine(AppContext.BaseDirectory, xmlFilename));
             });
-            #endif
+#endif
 
         }
 
@@ -134,10 +137,10 @@ namespace isnd
             {
                 app.UseDeveloperExceptionPage();
                 app.UseMigrationsEndPoint();
-                #if SWAGGER
+#if SWAGGER
                 app.UseSwagger();
                 app.UseSwaggerUI();
-                #endif
+#endif
             }
             else
             {
diff --git a/src/isnd/appsettings.json b/src/isnd/appsettings.json
index 1a0f421..9b3f99d 100644
--- a/src/isnd/appsettings.json
+++ b/src/isnd/appsettings.json
@@ -18,11 +18,6 @@
     "SenderName": "<from-name>",
     "SenderEmail": "<from-email>"
   },
-  "Unleash":
-  {
-    "ClientApiKey": "lame-unleash-client-api-key",
-    "ApiUrl": "http://localhost:4242/api/"
-  },
   "Logging": {
     "LogLevel": {
       "Default": "Warning"
diff --git a/test/data/test-isn/test-isn.csproj b/test/data/test-isn/test-isn.csproj
index bcad69b..dfe7449 100644
--- a/test/data/test-isn/test-isn.csproj
+++ b/test/data/test-isn/test-isn.csproj
@@ -11,11 +11,4 @@
     <Version>1.0.7</Version>
     
   </PropertyGroup>
-  <ItemGroup>
-  </ItemGroup>
-  <ItemGroup>
-  </ItemGroup>
-  <ItemGroup>
-    <PackageReference Include="isn.abst" Version="1.0.24" />
-  </ItemGroup>
 </Project>