diff --git a/types/joi/index.d.ts b/types/joi/index.d.ts
index c05367540a..f95fc905a8 100644
--- a/types/joi/index.d.ts
+++ b/types/joi/index.d.ts
@@ -503,6 +503,18 @@ export interface StringSchema extends AnySchema {
     max(limit: number, encoding?: string): this;
     max(limit: Reference, encoding?: string): this;
 
+    /**
+     * Specifies whether the string.max() limit should be used as a truncation.
+     * @param enabled - optional parameter defaulting to true which allows you to reset the behavior of truncate by providing a falsy value.
+     */
+    truncate(enabled?: boolean): this;
+
+    /**
+     * Requires the string value to be in a unicode normalized form. If the validation convert option is on (enabled by default), the string will be normalized.
+     * @param form - The unicode normalization form to use. Valid values: NFC [default], NFD, NFKC, NFKD
+     */
+    normalize(form?: 'NFC' | 'NFD' | 'NFKC' | 'NFKD'): this;
+
     /**
      * Requires the number to be a credit card number (Using Lunh Algorithm).
      */
diff --git a/types/joi/joi-tests.ts b/types/joi/joi-tests.ts
index 939059bdd3..96d91a72b9 100644
--- a/types/joi/joi-tests.ts
+++ b/types/joi/joi-tests.ts
@@ -773,6 +773,10 @@ strSchema = strSchema.isoDate();
 strSchema = strSchema.lowercase();
 strSchema = strSchema.uppercase();
 strSchema = strSchema.trim();
+strSchema = strSchema.truncate();
+strSchema = strSchema.truncate(false);
+strSchema = strSchema.normalize();
+strSchema = strSchema.normalize('NFKC');
 
 namespace common {
     strSchema = strSchema.allow(x);
diff --git a/types/joi/v10/index.d.ts b/types/joi/v10/index.d.ts
index 86fdc9271f..372975ed9e 100644
--- a/types/joi/v10/index.d.ts
+++ b/types/joi/v10/index.d.ts
@@ -501,6 +501,19 @@ export interface StringSchema extends AnySchema {
     max(limit: number, encoding?: string): this;
     max(limit: Reference, encoding?: string): this;
 
+
+    /**
+     * Specifies whether the string.max() limit should be used as a truncation.
+     * @param enabled - optional parameter defaulting to true which allows you to reset the behavior of truncate by providing a falsy value.
+     */
+    truncate(enabled?: boolean): this;
+
+    /**
+     * Requires the string value to be in a unicode normalized form. If the validation convert option is on (enabled by default), the string will be normalized.
+     * @param form - The unicode normalization form to use. Valid values: NFC [default], NFD, NFKC, NFKD
+     */
+    normalize(form?: 'NFC' | 'NFD' | 'NFKC' | 'NFKD'): this;
+
     /**
      * Requires the number to be a credit card number (Using Lunh Algorithm).
      */
diff --git a/types/joi/v10/joi-tests.ts b/types/joi/v10/joi-tests.ts
index f83196a983..226abb3a7f 100644
--- a/types/joi/v10/joi-tests.ts
+++ b/types/joi/v10/joi-tests.ts
@@ -773,6 +773,10 @@ strSchema = strSchema.isoDate();
 strSchema = strSchema.lowercase();
 strSchema = strSchema.uppercase();
 strSchema = strSchema.trim();
+strSchema = strSchema.truncate();
+strSchema = strSchema.truncate(false);
+strSchema = strSchema.normalize();
+strSchema = strSchema.normalize('NFKC');
 
 namespace common {
     strSchema = strSchema.allow(x);