diff --git a/apps/admin/app/studies/assignments/[studyDetailId]/_components/CustomTextField.tsx b/apps/admin/app/studies/assignments/[studyDetailId]/_components/CustomTextField.tsx
index ded4e55f..28979eba 100644
--- a/apps/admin/app/studies/assignments/[studyDetailId]/_components/CustomTextField.tsx
+++ b/apps/admin/app/studies/assignments/[studyDetailId]/_components/CustomTextField.tsx
@@ -1,3 +1,5 @@
+"use client";
+
 import { useController } from "react-hook-form";
 import type { TextFieldProps } from "wowds-ui/TextField";
 import TextField from "wowds-ui/TextField";
@@ -7,7 +9,6 @@ interface CustomTextFieldProps extends TextFieldProps {
   control: any;
 }
 
-// TODO: defaultValue 적용 안되는 문제
 const CustomTextField = ({
   name,
   control,
diff --git a/apps/admin/app/studies/assignments/[studyDetailId]/edit-assignment/page.tsx b/apps/admin/app/studies/assignments/[studyDetailId]/edit-assignment/page.tsx
index edfd3c96..fc6b7a78 100644
--- a/apps/admin/app/studies/assignments/[studyDetailId]/edit-assignment/page.tsx
+++ b/apps/admin/app/studies/assignments/[studyDetailId]/edit-assignment/page.tsx
@@ -20,19 +20,6 @@ const Assignments = ({
 }) => {
   const { open, onOpen } = useOpenState();
 
-  const methods = useForm<
-    AssignmentApiRequestDto & {
-      onOpen: () => void;
-    }
-  >({
-    defaultValues: {
-      title: "",
-      deadLine: "2024-09-07T00:00:00",
-      descriptionNotionLink: "",
-      onOpen: onOpen,
-    },
-  });
-
   const [assignment, setAssignment] = useState<AssignmentApiResponseDto | null>(
     null
   );
@@ -47,6 +34,19 @@ const Assignments = ({
     fetchAssignment();
   }, [studyDetailId]);
 
+  const methods = useForm<
+    AssignmentApiRequestDto & {
+      onOpen: () => void;
+    }
+  >({
+    defaultValues: {
+      title: assignment?.title,
+      deadLine: "2024-09-07T00:00:00",
+      descriptionNotionLink: assignment?.descriptionLink,
+      onOpen: onOpen,
+    },
+  });
+
   if (!assignment) return null;
 
   const { assignmentStatus, week } = assignment;