diff --git a/README.MD b/README.MD
index 69e4b72..8f33eb3 100644
--- a/README.MD
+++ b/README.MD
@@ -71,6 +71,8 @@ v.bootstrap();
 **aspnet-validation.min.js:** 10.6 KB **(9.46%, ~4 KB GZIP)**
 - **promise-polyfill**: +3.06 KB (< 1 KB GZIP)
 
+Also, `jquery.validate.unobtrusive.min.js` has not been meaningfully updated in over a decade, and is hard to configure.
+
 ## Building the Source Code
 
 ```powershell
@@ -245,6 +247,21 @@ let form = document.getElementById('my-form');
 v.scan(form);
 ```
 
+## Customizing CSS for use with other libraries
+
+One can customize the CSS classes so the generated markup is compatible with various frameworks. For example, to integrate with [Bootstrap](https://getbootstrap.com/docs/5.3/forms/validation) (v5+):
+
+```js
+var v = new aspnetValidation.ValidationService();
+v.ValidationInputCssClassName          = 'is-invalid';                 // change from default of 'input-validation-error'
+v.ValidationInputValidCssClassName     = 'is-valid';                   // change from default of 'input-validation-valid'
+v.ValidationMessageCssClassName        = 'invalid-feedback';           // change from default of 'field-validation-error'
+v.ValidationMessageValidCssClassName   = 'valid-feedback';             // change from default of 'field-validation-valid'
+//v.ValidationSummaryCssClassName      = 'validation-summary-errors';  // unnecessary: bootstrap lacks validation summary component
+//v.ValidationSummaryValidCssClassName = 'validation-summary-valid';   // "
+v.bootstrap();
+```
+
 ## Logging
 
 There is a rudimentary logging infrastructure in place if you want to get more insight into what the library is doing.
diff --git a/src/index.ts b/src/index.ts
index 8925c69..f9c6e13 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1419,7 +1419,7 @@ export class ValidationService {
     ValidationSummaryCssClassName = "validation-summary-errors";
 
     /**
-     * Override CSS class name for valid validation summary. Default: 'field-validation-valid'
+     * Override CSS class name for valid validation summary. Default: 'validation-summary-valid'
      */
     ValidationSummaryValidCssClassName = "validation-summary-valid";
 }