diff --git a/Directory.Build.props b/Directory.Build.props
index 5ff9a6c..d574c8d 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -9,7 +9,7 @@
 	<Product>Domain Primitives</Product>
 	<Company>ALTA Software llc.</Company>
 	<Copyright>Copyright © 2024 ALTA Software llc.</Copyright>
-	<Version>2.2.1</Version>
+	<Version>2.2.3</Version>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/AltaSoft.DomainPrimitives/SwaggerGenOptionsExt.cs b/src/AltaSoft.DomainPrimitives/SwaggerGenOptionsExt.cs
index b0626f5..f382398 100644
--- a/src/AltaSoft.DomainPrimitives/SwaggerGenOptionsExt.cs
+++ b/src/AltaSoft.DomainPrimitives/SwaggerGenOptionsExt.cs
@@ -36,14 +36,17 @@ public static void AddAllDomainPrimitivesSwaggerMappings(this SwaggerGenOptions
             .Where(a => IsSystemAssembly(a.FullName)).Select(a => a.FullName!));
 
         var assembliesToCheck = new Queue<Assembly>(AppDomain.CurrentDomain.GetAssemblies());
+        var processedPrimitiveAssemblies = new HashSet<Assembly>();
 
         while (assembliesToCheck.Count > 0)
         {
             var assembly = assembliesToCheck.Dequeue();
 
-            if (assembly.GetCustomAttribute<DomainPrimitiveAssemblyAttribute>() is not null)
+            if (!processedPrimitiveAssemblies.Contains(assembly) &&
+                assembly.GetCustomAttribute<DomainPrimitiveAssemblyAttribute>() is not null)
             {
                 ProcessAssembly(assembly, options);
+                processedPrimitiveAssemblies.Add(assembly);
             }
 
             foreach (var reference in assembly.GetReferencedAssemblies())