diff --git a/lib/rules/template-no-implicit-this.js b/lib/rules/template-no-implicit-this.js
index 00f08aab03..74ab5e2ca2 100644
--- a/lib/rules/template-no-implicit-this.js
+++ b/lib/rules/template-no-implicit-this.js
@@ -108,8 +108,8 @@ module.exports = {
         properties: {
           allow: {
             type: 'array',
-            items: { type: 'string' },
-            uniqueItems: true,
+            items: { anyOf: [{ type: 'string' }, { instanceof: 'RegExp' }] },
+            uniqueItems: false,
           },
         },
         additionalProperties: false,
@@ -145,8 +145,8 @@ module.exports = {
           return;
         }
 
-        // Skip paths matching the allow list (exact match only)
-        if (allowList.includes(path)) {
+        // Skip paths matching the allow list (exact string or regex)
+        if (allowList.some((item) => (item instanceof RegExp ? item.test(path) : item === path))) {
           return;
         }
 
diff --git a/tests/lib/rules/template-no-implicit-this.js b/tests/lib/rules/template-no-implicit-this.js
index 0871f76cdc..f69482b838 100644
--- a/tests/lib/rules/template-no-implicit-this.js
+++ b/tests/lib/rules/template-no-implicit-this.js
@@ -204,6 +204,11 @@ hbsRuleTester.run('template-no-implicit-this', rule, {
       code: '{{book-details}}',
       options: [{ allow: ['book-details'] }],
     },
+    // Allow config option — regex pattern
+    {
+      code: '{{data-test-foo}}',
+      options: [{ allow: [/^data-test-.+/] }],
+    },
   ],
   invalid: [
     {