diff --git a/src/NSwag.AssemblyLoader/NSwag.AssemblyLoader.csproj b/src/NSwag.AssemblyLoader/NSwag.AssemblyLoader.csproj
index f479253f25..c730db46ae 100644
--- a/src/NSwag.AssemblyLoader/NSwag.AssemblyLoader.csproj
+++ b/src/NSwag.AssemblyLoader/NSwag.AssemblyLoader.csproj
@@ -57,6 +57,7 @@
     <Compile Include="SwaggerGenerators\AssemblyTypeToSwaggerGeneratorSettings.cs" />
     <Compile Include="SwaggerGenerators\WebApi\WebApiAssemblyToSwaggerGenerator.cs" />
     <Compile Include="SwaggerGenerators\WebApi\WebApiAssemblyToSwaggerGeneratorSettings.cs" />
+    <Compile Include="Utilities\PathUtilities.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\..\NJsonSchema\src\NJsonSchema\NJsonSchema.csproj">
diff --git a/src/NSwag.AssemblyLoader/SwaggerGenerators/WebApi/WebApiAssemblyToSwaggerGenerator.cs b/src/NSwag.AssemblyLoader/SwaggerGenerators/WebApi/WebApiAssemblyToSwaggerGenerator.cs
index 70ea7c2bf7..929ebb0603 100644
--- a/src/NSwag.AssemblyLoader/SwaggerGenerators/WebApi/WebApiAssemblyToSwaggerGenerator.cs
+++ b/src/NSwag.AssemblyLoader/SwaggerGenerators/WebApi/WebApiAssemblyToSwaggerGenerator.cs
@@ -13,6 +13,7 @@
 using System.Reflection;
 using Newtonsoft.Json;
 using NSwag.CodeGeneration.Infrastructure;
+using NSwag.CodeGeneration.Utilities;
 
 namespace NSwag.CodeGeneration.SwaggerGenerators.WebApi
 {
@@ -124,7 +125,7 @@ internal string[] GetControllerClasses(string[] assemblyPaths, IEnumerable<strin
             {
                 RegisterReferencePaths(referencePaths);
 
-                return assemblyPaths
+                return PathUtilities.ExpandFileWildcards(assemblyPaths)
                     .Select(Assembly.LoadFrom)
                     .SelectMany(WebApiToSwaggerGenerator.GetControllerClasses)
                     .Select(t => t.FullName)
diff --git a/src/NSwag/Utilities/PathUtilities.cs b/src/NSwag.AssemblyLoader/Utilities/PathUtilities.cs
similarity index 50%
rename from src/NSwag/Utilities/PathUtilities.cs
rename to src/NSwag.AssemblyLoader/Utilities/PathUtilities.cs
index 70c178ab7c..05be06e3a3 100644
--- a/src/NSwag/Utilities/PathUtilities.cs
+++ b/src/NSwag.AssemblyLoader/Utilities/PathUtilities.cs
@@ -1,109 +1,134 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Text.RegularExpressions;
-
-namespace NSwag.Utilities
-{
-    public static class PathUtilities
-    {
-        // TODO: Move to MyToolkit
-
-        public static IEnumerable<string> ExpandWildcards(string path)
-        {
-            return ExpandWildcards(new[] { path });
-        }
-
-        public static IEnumerable<string> ExpandWildcards(IEnumerable<string> paths)
-        {
-            var allFiles = new List<string>();
-            foreach (var path in paths)
-            {
-                if (path.Contains("*"))
-                {
-                    var starIndex = path.IndexOf("*", StringComparison.InvariantCulture);
-
-                    var rootIndex = path.IndexOf("\\", 0, starIndex, StringComparison.InvariantCulture);
-                    if (rootIndex == -1)
-                        rootIndex = path.IndexOf("/", 0, starIndex, StringComparison.InvariantCulture);
-
-                    var rootPath = rootIndex >= 0 ? path.Substring(0, rootIndex + 1) : Directory.GetCurrentDirectory();
-                    var files = Directory.GetFiles(rootPath, "*", SearchOption.AllDirectories);
-
-                    var regex = new Regex(
-                        Regex.Escape(path.Substring(rootIndex + 1)
-                        .Replace("/", "__del__")
-                        .Replace("\\", "__del__")
-                        .Replace("**", "__starstar__")
-                        .Replace("*", "__star__"))
-                        .Replace("__del__", "[\\\\/]")
-                        .Replace("__starstar__", "(.*?)")
-                        .Replace("__star__", "([^\\/]*?)"));
-
-                    allFiles.AddRange(files
-                        .Where(f => regex.Match(f).Success)
-                        .Select(Path.GetFullPath));
-                }
-                else
-                    allFiles.Add(path);
-            }
-
-            return allFiles.Distinct();
-        }
-
-        public static string MakeAbsolutePath(string relativePath, string relTo)
-        {
-            var absolutePath = System.IO.Path.Combine(relativePath, relTo);
-            return System.IO.Path.GetFullPath(new Uri(absolutePath).LocalPath);
-        }
-
-        /// <exception cref="ArgumentException">The path of the two files doesn't have any common base.</exception>
-        public static string MakeRelativePath(string absPath, string relTo)
-        {
-            string[] absParts = absPath.Split(System.IO.Path.DirectorySeparatorChar);
-            string[] relParts = relTo.Split(System.IO.Path.DirectorySeparatorChar);
-
-            // Get the shortest of the two paths
-            int len = absParts.Length < relParts.Length ? absParts.Length : relParts.Length;
-
-            // Use to determine where in the loop we exited
-            int lastCommonRoot = -1;
-            int index;
-
-            // Find common root
-            for (index = 0; index < len; index++)
-            {
-                if (absParts[index].Equals(relParts[index], StringComparison.OrdinalIgnoreCase))
-                    lastCommonRoot = index;
-                else
-                    break;
-            }
-
-            // If we didn't find a common prefix then throw
-            if (lastCommonRoot == -1)
-                return absPath;
-
-            // Build up the relative path
-            var relativePath = new StringBuilder();
-
-            // Add on the ..
-            for (index = lastCommonRoot + 1; index < relParts.Length; index++)
-            {
-                relativePath.Append("..");
-                relativePath.Append(System.IO.Path.DirectorySeparatorChar);
-            }
-
-            // Add on the folders
-            for (index = lastCommonRoot + 1; index < absParts.Length - 1; index++)
-            {
-                relativePath.Append(absParts[index]);
-                relativePath.Append(System.IO.Path.DirectorySeparatorChar);
-            }
-            relativePath.Append(absParts[absParts.Length - 1]);
-
-            return relativePath.ToString();
-        }
-    }
-}
+//-----------------------------------------------------------------------
+// <copyright file="PathUtilities.cs" company="NSwag">
+//     Copyright (c) Rico Suter. All rights reserved.
+// </copyright>
+// <license>https://github.com/NSwag/NSwag/blob/master/LICENSE.md</license>
+// <author>Rico Suter, mail@rsuter.com</author>
+//-----------------------------------------------------------------------
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace NSwag.CodeGeneration.Utilities
+{
+    /// <summary>Provides file path utility methods.</summary>
+    public static class PathUtilities
+    {
+        // TODO: Move to MyToolkit
+
+        /// <summary>Expands the given wildcards (** or *) in the path.</summary>
+        /// <param name="path">The file path with wildcards.</param>
+        /// <returns>All expanded file paths.</returns>
+        public static IEnumerable<string> ExpandFileWildcards(string path)
+        {
+            return ExpandFileWildcards(new[] { path });
+        }
+
+        /// <summary>Expands the given wildcards (** or *) in the paths.</summary>
+        /// <param name="paths">The files path with wildcards.</param>
+        /// <returns>All expanded file paths.</returns>
+        public static IEnumerable<string> ExpandFileWildcards(IEnumerable<string> paths)
+        {
+            var allFiles = new List<string>();
+            foreach (var path in paths)
+            {
+                if (path.Contains("*"))
+                {
+                    var starIndex = path.IndexOf("*", StringComparison.InvariantCulture);
+
+                    var rootIndex = path.Substring(0, starIndex).LastIndexOf("\\", StringComparison.InvariantCulture);
+                    if (rootIndex == -1)
+                        rootIndex = path.Substring(0, starIndex).LastIndexOf("/", StringComparison.InvariantCulture);
+
+                    var rootPath = rootIndex >= 0 ? path.Substring(0, rootIndex + 1) : Directory.GetCurrentDirectory();
+                    var files = Directory.GetFiles(rootPath, "*", SearchOption.AllDirectories);
+
+                    var regex = new Regex(
+                        "^" + 
+                        Regex.Escape(path//.Substring(rootIndex + 1)
+                        .Replace("**/", "__starstar__")
+                        .Replace("**\\", "__starstar__")
+                        .Replace("/", "__del__")
+                        .Replace("\\", "__del__")
+                        .Replace("*", "__star__"))
+                        .Replace("__del__", "([\\\\/])")
+                        .Replace("__starstar__", "((.*?)[/\\\\])")
+                        .Replace("__star__", "([^\\/]*?)") + "$");
+
+                    allFiles.AddRange(files
+                        .Where(f => regex.Match(f).Success)
+                        .Select(Path.GetFullPath));
+                }
+                else
+                    allFiles.Add(path);
+            }
+
+            return allFiles.Distinct();
+        }
+
+        /// <summary>Converts a relative path to an absolute path.</summary>
+        /// <param name="relativePath">The relative path.</param>
+        /// <param name="relativeTo">The current directory.</param>
+        /// <returns>The absolute path.</returns>
+        public static string MakeAbsolutePath(string relativePath, string relativeTo)
+        {
+            var absolutePath = Path.Combine(relativePath, relativeTo);
+            return Path.GetFullPath(new Uri(absolutePath).LocalPath);
+        }
+
+        /// <summary>Converts an absolute path to a relative path if possible.</summary>
+        /// <param name="absolutePath">The absolute path.</param>
+        /// <param name="relativeTo">The current directory.</param>
+        /// <returns>The relative path.</returns>
+        /// <exception cref="ArgumentException">The path of the two files doesn't have any common base.</exception>
+        public static string MakeRelativePath(string absolutePath, string relativeTo)
+        {
+            string[] absParts = absolutePath.Split(System.IO.Path.DirectorySeparatorChar);
+            string[] relParts = relativeTo.Split(System.IO.Path.DirectorySeparatorChar);
+
+            // Get the shortest of the two paths
+            int len = absParts.Length < relParts.Length ? absParts.Length : relParts.Length;
+
+            // Use to determine where in the loop we exited
+            int lastCommonRoot = -1;
+            int index;
+
+            // Find common root
+            for (index = 0; index < len; index++)
+            {
+                if (absParts[index].Equals(relParts[index], StringComparison.OrdinalIgnoreCase))
+                    lastCommonRoot = index;
+                else
+                    break;
+            }
+
+            // If we didn't find a common prefix then throw
+            if (lastCommonRoot == -1)
+                return absolutePath;
+
+            // Build up the relative path
+            var relativePath = new StringBuilder();
+
+            // Add on the ..
+            for (index = lastCommonRoot + 1; index < relParts.Length; index++)
+            {
+                relativePath.Append("..");
+                relativePath.Append(System.IO.Path.DirectorySeparatorChar);
+            }
+
+            // Add on the folders
+            for (index = lastCommonRoot + 1; index < absParts.Length - 1; index++)
+            {
+                relativePath.Append(absParts[index]);
+                relativePath.Append(System.IO.Path.DirectorySeparatorChar);
+            }
+            relativePath.Append(absParts[absParts.Length - 1]);
+
+            return relativePath.ToString();
+        }
+    }
+}
diff --git a/src/NSwag.Tests/Commands/WildcardTests.cs b/src/NSwag.Tests/Commands/WildcardTests.cs
index 03407f3560..39701fa133 100644
--- a/src/NSwag.Tests/Commands/WildcardTests.cs
+++ b/src/NSwag.Tests/Commands/WildcardTests.cs
@@ -1,11 +1,6 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.Linq;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
-using NSwag.Utilities;
+using NSwag.CodeGeneration.Utilities;
 
 namespace NSwag.Tests.Commands
 {
@@ -19,11 +14,10 @@ public void When_path_has_wildcards_then_they_are_expanded_correctly()
             
 
             //// Act
-            var x = Directory.GetCurrentDirectory();
-            var files = PathUtilities.ExpandWildcards("../../**/*.dll");
+            var files = PathUtilities.ExpandFileWildcards("../../**/NSwag.*.dll").ToList();
 
             //// Assert
-
+            Assert.IsTrue(files.Any(f => f.Contains("bin\\Debug")) || files.Any(f => f.Contains("bin\\Release")));
         }
     }
 }
diff --git a/src/NSwag.Tests/NSwag.Tests.csproj b/src/NSwag.Tests/NSwag.Tests.csproj
index 039ddeb468..362bb86c85 100644
--- a/src/NSwag.Tests/NSwag.Tests.csproj
+++ b/src/NSwag.Tests/NSwag.Tests.csproj
@@ -80,6 +80,10 @@
       <Project>{7B7A2E32-E808-4A19-98B1-37E766580F8C}</Project>
       <Name>NJsonSchema</Name>
     </ProjectReference>
+    <ProjectReference Include="..\NSwag.AssemblyLoader\NSwag.AssemblyLoader.csproj">
+      <Project>{46634C60-BA7D-43E6-9049-6AD461488C39}</Project>
+      <Name>NSwag.AssemblyLoader</Name>
+    </ProjectReference>
     <ProjectReference Include="..\NSwag.CodeGeneration\NSwag.CodeGeneration.csproj">
       <Project>{75B3F91D-687E-4FB3-AD45-CCFA3C406DB4}</Project>
       <Name>NSwag.CodeGeneration</Name>
diff --git a/src/NSwag/NSwag.csproj b/src/NSwag/NSwag.csproj
index b78f21d3d2..339ebe3e1e 100644
--- a/src/NSwag/NSwag.csproj
+++ b/src/NSwag/NSwag.csproj
@@ -71,7 +71,6 @@
     <Compile Include="NSwagDocument.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
-    <Compile Include="Utilities\PathUtilities.cs" />
   </ItemGroup>
   <ItemGroup>
     <Content Include="App.config">
diff --git a/src/NSwag/NSwagDocument.cs b/src/NSwag/NSwagDocument.cs
index 4e01c36b2a..ecac39f8f5 100644
--- a/src/NSwag/NSwagDocument.cs
+++ b/src/NSwag/NSwagDocument.cs
@@ -16,7 +16,7 @@
 using NJsonSchema;
 using NSwag.Commands;
 using NSwag.Commands.Base;
-using NSwag.Utilities;
+using NSwag.CodeGeneration.Utilities;
 
 namespace NSwag
 {