diff --git a/src/ytdl_sub/script/types/variable_dependency.py b/src/ytdl_sub/script/types/variable_dependency.py
index 21716124..3e8bfdb4 100644
--- a/src/ytdl_sub/script/types/variable_dependency.py
+++ b/src/ytdl_sub/script/types/variable_dependency.py
@@ -114,6 +114,7 @@ class VariableDependency(ABC):
                 output.add(ParsedCustomFunction(name=arg.name, num_input_args=len(arg.args)))
             if isinstance(arg, VariableDependency):
                 output.update(arg.custom_functions)
+            # if isinstance(arg, Lambda)
 
         return output
 
@@ -189,7 +190,17 @@ class VariableDependency(ABC):
         -------
         True if it contains any of the input variables. False otherwise.
         """
-        for custom_function in self.custom_functions:
+        # If there are lambdas, see if they are custom functions. If so, check them
+        custom_functions_to_check = self.custom_functions
+        for lambda_func in self.lambdas:
+            if lambda_func.value in custom_function_definitions:
+                custom_functions_to_check.add(
+                    ParsedCustomFunction(
+                        name=lambda_func.value, num_input_args=lambda_func.num_input_args()
+                    )
+                )
+
+        for custom_function in custom_functions_to_check:
             if custom_function_definitions[custom_function.name].contains(
                 variables=variables, custom_function_definitions=custom_function_definitions
             ):
diff --git a/tests/unit/script/types/test_lambda_function.py b/tests/unit/script/types/test_lambda_function.py
index 07105477..1112afc4 100644
--- a/tests/unit/script/types/test_lambda_function.py
+++ b/tests/unit/script/types/test_lambda_function.py
@@ -76,6 +76,28 @@ class TestLambdaFunction:
 
         assert script.resolve().get("category_url_map").native == {1: 1, 2: 2, 3: 3}
 
+    def test_array_apply_custom_function(self):
+        output = (
+            Script(
+                {
+                    "the_array": "{ ['a', 'B', 'c', 'D'] }",
+                    "output": "{ %array_apply(the_array, %lower) }",
+                    "should_lower": "{%bool(True)}",
+                    "%custom_cap": """{
+                        %if(
+                            %bool(should_lower),
+                            %lower($0),
+                            %upper($0)
+                        )
+                    }""",
+                }
+            )
+            .resolve(update=True)
+            .get("output")
+            .native
+        )
+        assert output == ["a", "b", "c", "d"]
+
 
 class TestLambdaFunctionIncompatibleNumArguments:
     @pytest.mark.parametrize(