diff --git a/src/twig.expression.operator.js b/src/twig.expression.operator.js
index 027382e1..1ef23ab5 100644
--- a/src/twig.expression.operator.js
+++ b/src/twig.expression.operator.js
@@ -17,6 +17,11 @@ module.exports = function (Twig) {
             return null;
         }
 
+        if (b && Array.isArray(b)) {
+            // Array
+            return JSON.stringify(b).includes(JSON.stringify(a));
+        }
+
         if (b.indexOf !== undefined) {
             // String
             return (a === b || a !== '') && b.includes(a);
diff --git a/test/test.expressions.js b/test/test.expressions.js
index 3563bd80..c0d61a71 100644
--- a/test/test.expressions.js
+++ b/test/test.expressions.js
@@ -381,6 +381,12 @@ describe('Twig.js Expressions ->', function () {
 
             testTemplate = twig({data: '{{ "d" in ["a", "b", "c"] }}'});
             testTemplate.render().should.equal(false.toString());
+
+            testTemplate = twig({data: '{{ ["a", "b"] in [["a", "b"], ["c", "d"]] }}'});
+            testTemplate.render().should.equal(true.toString());
+
+            testTemplate = twig({data: '{{ ["a", "c"] in [["a", "b"], ["c", "d"]] }}'});
+            testTemplate.render().should.equal(false.toString());
         });
 
         it('should support not in/containment functionality for arrays', function () {
@@ -391,6 +397,12 @@ describe('Twig.js Expressions ->', function () {
 
             testTemplate = twig({data: '{{ "d" not in ["a", "b", "c"] }}'});
             testTemplate.render().should.equal(true.toString());
+
+            testTemplate = twig({data: '{{ ["a", "b"] not in [["a", "b"], ["c", "d"]] }}'});
+            testTemplate.render().should.equal(false.toString());
+
+            testTemplate = twig({data: '{{ ["a", "c"] not in [["a", "b"], ["c", "d"]] }}'});
+            testTemplate.render().should.equal(true.toString());
         });
 
         it('should support in/containment functionality for strings', function () {