diff --git a/src/addons/mod/scorm/classes/data-model-12.ts b/src/addons/mod/scorm/classes/data-model-12.ts
index 3cf3faafb..97268ff4d 100644
--- a/src/addons/mod/scorm/classes/data-model-12.ts
+++ b/src/addons/mod/scorm/classes/data-model-12.ts
@@ -25,8 +25,8 @@ import {
 } from '../services/scorm';
 
 // Standard Data Type Definition.
-const CMI_STRING_256 = '^[\\u0000-\\uFFFF]{0,255}$';
-const CMI_STRING_4096 = '^[\\u0000-\\uFFFF]{0,4096}$';
+const CMI_STRING_256 = '^[\\u0000-\\uFFFF]{0,64000}$';
+const CMI_STRING_4096 = '^[\\u0000-\\uFFFF]{0,64000}$';
 const CMI_TIME = '^([0-2]{1}[0-9]{1}):([0-5]{1}[0-9]{1}):([0-5]{1}[0-9]{1})(.[0-9]{1,2})?$';
 const CMI_TIMESPAN = '^([0-9]{2,4}):([0-9]{2}):([0-9]{2})(.[0-9]{1,2})?$';
 const CMI_INTEGER = '^\\d+$'; // eslint-disable-line @typescript-eslint/no-unused-vars