diff --git a/backend/src/ingestJSON.ts b/backend/src/ingestJSON.ts
index a9b0583..8ceb681 100644
--- a/backend/src/ingestJSON.ts
+++ b/backend/src/ingestJSON.ts
@@ -1,6 +1,8 @@
 import { QueryRunner } from "typeorm";
 import { sectionTypeEnum } from "../../lib/src/index.js";
+import { env } from "./config/server.js";
 import { Course, Section, Timetable } from "./entity/entities.js";
+import sqids from "./utils/sqids.js";
 
 interface ExamJSON {
   midsem: string | null;
@@ -325,6 +327,140 @@ export const ingestJSON = async (
       .execute();
     console.log("sections inserted!");
 
+    console.log("removing old courses from search service...");
+    const [oldCourseIds, oldCourseCount] = await queryRunner.manager
+      .createQueryBuilder()
+      .select("course.id")
+      .from(Course, "course")
+      .where("course.archived = :archived", { archived: true })
+      .getManyAndCount();
+    console.log(`${oldCourseCount} old courses found`);
+    for (const { id } of oldCourseIds) {
+      try {
+        const searchServiceURL = `${env.SEARCH_SERVICE_URL}/course/remove`;
+        const res = await fetch(searchServiceURL, {
+          method: "DELETE",
+          headers: {
+            "Content-Type": "application/json",
+          },
+          body: JSON.stringify({ id }),
+        });
+        if (!res.ok) {
+          const resJson = await res.json();
+          console.log(
+            `error while removing course ${id} from search service: ${resJson.error}`,
+          );
+        }
+      } catch (err: any) {
+        console.log(
+          `error while removing course ${id} from search service: ${err.message}`,
+        );
+      }
+    }
+    console.log("removed old courses from search service!");
+
+    console.log("adding updated courses into search service...");
+    const [updatedCourseIds, updatedCourseCount] = await queryRunner.manager
+      .createQueryBuilder()
+      .select("course.id")
+      .from(Course, "course")
+      .getManyAndCount();
+    console.log(`${updatedCourseCount} courses found`);
+    for (const { id } of updatedCourseIds) {
+      const course = await queryRunner.manager
+        .createQueryBuilder()
+        .select("course")
+        .from(Course, "course")
+        .leftJoinAndSelect("course.sections", "section")
+        .where("course.id = :id", { id: id })
+        .getOne();
+      try {
+        const searchServiceURL = `${env.SEARCH_SERVICE_URL}/course/add`;
+        const res = await fetch(searchServiceURL, {
+          method: "POST",
+          headers: {
+            "Content-Type": "application/json",
+          },
+          body: JSON.stringify(course),
+        });
+        if (!res.ok) {
+          const resJson = await res.json();
+          console.log(
+            `error while adding course ${id} to search service: ${resJson.error}`,
+          );
+        }
+      } catch (err: any) {
+        console.log(
+          `error while adding course ${id} to search service: ${err.message}`,
+        );
+      }
+    }
+    console.log("added updated courses to search service!");
+
+    console.log("updating timetables in search service...");
+    const [timetableIds, timetableCount] = await queryRunner.manager
+      .createQueryBuilder()
+      .select("timetable.id")
+      .from(Timetable, "timetable")
+      .where("timetable.archived = :archived", { archived: true })
+      .getManyAndCount();
+    console.log(`${timetableCount} timetables are to be updated`);
+    for (const { id } of timetableIds) {
+      const encodedId = sqids.encode([id]);
+      try {
+        const searchServiceURL = `${env.SEARCH_SERVICE_URL}/timetable/remove`;
+        const res = await fetch(searchServiceURL, {
+          method: "DELETE",
+          headers: {
+            "Content-Type": "application/json",
+          },
+          body: JSON.stringify({ id: encodedId }),
+        });
+        if (!res.ok) {
+          const resJson = await res.json();
+          console.log(
+            `error while removing timetable ${id} from search service: ${resJson.error}`,
+          );
+        }
+      } catch (err: any) {
+        console.log(
+          `error while removing timetable ${id} from search service: ${err.message}`,
+        );
+      }
+      const timetable = await queryRunner.manager
+        .createQueryBuilder()
+        .select("timetable")
+        .from(Timetable, "timetable")
+        .leftJoinAndSelect("timetable.sections", "section")
+        .where("timetable.id = :id", { id })
+        .getOne();
+      const timetableWithSqid = {
+        ...timetable,
+        id: encodedId,
+      };
+      try {
+        const searchServiceURL = `${env.SEARCH_SERVICE_URL}/timetable/add`;
+        const res = await fetch(searchServiceURL, {
+          method: "POST",
+          headers: {
+            "Content-Type": "application/json",
+          },
+          body: JSON.stringify(timetableWithSqid),
+        });
+        if (!res.ok) {
+          const resJson = await res.json();
+          console.log(
+            `error while adding timetable ${id} to search service: ${resJson.error}`,
+          );
+        }
+      } catch (err: any) {
+        console.log(
+          `error while adding timetable ${id} to search service: ${err.message}`,
+        );
+      }
+    }
+    console.log("updated timetables in search service!");
+
     await queryRunner.commitTransaction();
     // show summary of the transaction
     console.log("================= SUMMARY =================");