diff --git a/src/services/rsvp/rsvp-router.test.ts b/src/services/rsvp/rsvp-router.test.ts
index bb0a30d8..4ab22ee8 100644
--- a/src/services/rsvp/rsvp-router.test.ts
+++ b/src/services/rsvp/rsvp-router.test.ts
@@ -2,7 +2,7 @@ import { describe, expect, it, beforeEach } from "@jest/globals";
 import { TESTER, getAsAttendee, getAsStaff, putAsApplicant, getAsAdmin } from "../../testTools.js";
 import { DecisionStatus, DecisionResponse } from "../../database/decision-db.js";
 import Models from "../../database/models.js";
-import Constants from "../../constants.js";
+import { StatusCode } from "status-code-enum";
 
 const TESTER_DECISION_INFO = {
     userId: TESTER.id,
@@ -23,13 +23,13 @@ describe("GET /rsvp", () => {
             userId: TESTER.id,
         });
 
-        const response = await getAsAttendee("/rsvp/").expect(Constants.BAD_REQUEST);
+        const response = await getAsAttendee("/rsvp/").expect(StatusCode.ClientErrorBadRequest);
 
         expect(JSON.parse(response.text)).toHaveProperty("error", "UserNotFound");
     });
 
     it("works for an attendee user and returns filtered data", async () => {
-        const response = await getAsAttendee("/rsvp/").expect(Constants.SUCCESS);
+        const response = await getAsAttendee("/rsvp/").expect(StatusCode.SuccessOK);
 
         expect(JSON.parse(response.text)).toMatchObject({
             userId: TESTER.id,
@@ -39,7 +39,7 @@ describe("GET /rsvp", () => {
     });
 
     it("works for a staff user and returns unfiltered data", async () => {
-        const response = await getAsStaff("/rsvp/").expect(Constants.SUCCESS);
+        const response = await getAsStaff("/rsvp/").expect(StatusCode.SuccessOK);
 
         expect(JSON.parse(response.text)).toMatchObject(TESTER_DECISION_INFO);
     });
@@ -53,13 +53,13 @@ describe("GET /rsvp/:USERID", () => {
     });
 
     it("gets if caller has elevated perms (Staff)", async () => {
-        const response = await getAsStaff(`/rsvp/${TESTER.id}`).expect(Constants.SUCCESS);
+        const response = await getAsStaff(`/rsvp/${TESTER.id}`).expect(StatusCode.SuccessOK);
 
         expect(JSON.parse(response.text)).toMatchObject(TESTER_DECISION_INFO);
     });
 
     it("gets if caller has elevated perms (Admin)", async () => {
-        const response = await getAsAdmin("/rsvp/" + TESTER.id).expect(Constants.SUCCESS);
+        const response = await getAsAdmin("/rsvp/" + TESTER.id).expect(StatusCode.SuccessOK);
 
         expect(JSON.parse(response.text)).toMatchObject(TESTER_DECISION_INFO);
     });
@@ -68,7 +68,7 @@ describe("GET /rsvp/:USERID", () => {
         await Models.DecisionInfo.deleteOne({
             userId: TESTER.id,
         });
-        const response = await getAsStaff("/rsvp/idontexist").expect(Constants.BAD_REQUEST);
+        const response = await getAsStaff("/rsvp/idontexist").expect(StatusCode.ClientErrorBadRequest);
 
         expect(JSON.parse(response.text)).toHaveProperty("error", "UserNotFound");
     });
@@ -76,7 +76,7 @@ describe("GET /rsvp/:USERID", () => {
 
 describe("PUT /rsvp", () => {
     it("error checking for empty query works", async () => {
-        const response = await putAsApplicant("/rsvp/").send({}).expect(Constants.BAD_REQUEST);
+        const response = await putAsApplicant("/rsvp/").send({}).expect(StatusCode.ClientErrorBadRequest);
 
         expect(JSON.parse(response.text)).toHaveProperty("error", "InvalidParams");
     });
@@ -85,19 +85,19 @@ describe("PUT /rsvp", () => {
         await Models.DecisionInfo.deleteOne({
             userId: TESTER.id,
         });
-        const response = await putAsApplicant("/rsvp/").send({ isAttending: true }).expect(Constants.BAD_REQUEST);
+        const response = await putAsApplicant("/rsvp/").send({ isAttending: true }).expect(StatusCode.ClientErrorBadRequest);
 
         expect(JSON.parse(response.text)).toHaveProperty("error", "UserNotFound");
     });
 
     it("lets applicant accept accepted decision", async () => {
-        const response = await putAsApplicant("/rsvp/").send({ isAttending: true }).expect(Constants.SUCCESS);
+        const response = await putAsApplicant("/rsvp/").send({ isAttending: true }).expect(StatusCode.SuccessOK);
 
         expect(JSON.parse(response.text)).toHaveProperty("response", DecisionResponse.ACCEPTED);
     });
 
     it("lets applicant reject accepted decision", async () => {
-        const response = await putAsApplicant("/rsvp/").send({ isAttending: false }).expect(Constants.SUCCESS);
+        const response = await putAsApplicant("/rsvp/").send({ isAttending: false }).expect(StatusCode.SuccessOK);
 
         expect(JSON.parse(response.text)).toHaveProperty("response", DecisionResponse.DECLINED);
     });
@@ -105,7 +105,7 @@ describe("PUT /rsvp", () => {
     it("doesn't let applicant accept rejected decision", async () => {
         await Models.DecisionInfo.findOneAndUpdate({ userId: TESTER.id }, { status: DecisionStatus.REJECTED });
 
-        const response = await putAsApplicant("/rsvp/").send({ isAttending: false }).expect(Constants.FORBIDDEN);
+        const response = await putAsApplicant("/rsvp/").send({ isAttending: false }).expect(StatusCode.ClientErrorForbidden);
 
         expect(JSON.parse(response.text)).toHaveProperty("error", "Forbidden");
     });
diff --git a/src/services/rsvp/rsvp-router.ts b/src/services/rsvp/rsvp-router.ts
index a1d777b9..dd0237cd 100644
--- a/src/services/rsvp/rsvp-router.ts
+++ b/src/services/rsvp/rsvp-router.ts
@@ -1,5 +1,5 @@
 import { Request, Response, Router } from "express";
-import Constants from "../../constants.js";
+import { StatusCode } from "status-code-enum";
 import { strongJwtVerification } from "../../middleware/verify-jwt.js";
 import { JwtPayload } from "../auth/auth-models.js";
 import { hasElevatedPerms } from "../auth/auth-lib.js";
@@ -46,10 +46,10 @@ rsvpRouter.get("/:USERID", strongJwtVerification, async (req: Request, res: Resp
 
     //Returns error if query is empty
     if (!queryResult) {
-        return res.status(Constants.BAD_REQUEST).send({ error: "UserNotFound" });
+        return res.status(StatusCode.ClientErrorBadRequest).send({ error: "UserNotFound" });
     }
 
-    return res.status(Constants.SUCCESS).send(queryResult.toObject());
+    return res.status(StatusCode.SuccessOK).send(queryResult.toObject());
 });
 
 /**
@@ -93,7 +93,7 @@ rsvpRouter.get("/", strongJwtVerification, async (_: Request, res: Response) =>
 
     //Returns error if query is empty
     if (!queryResult) {
-        return res.status(Constants.BAD_REQUEST).send({ error: "UserNotFound" });
+        return res.status(StatusCode.ClientErrorBadRequest).send({ error: "UserNotFound" });
     }
 
     const toReturn = queryResult.toObject();
@@ -104,7 +104,7 @@ rsvpRouter.get("/", strongJwtVerification, async (_: Request, res: Response) =>
         delete toReturn.emailSent;
     }
 
-    return res.status(Constants.SUCCESS).send(toReturn);
+    return res.status(StatusCode.SuccessOK).send(toReturn);
 });
 
 /**
@@ -142,7 +142,7 @@ rsvpRouter.put("/", strongJwtVerification, async (req: Request, res: Response) =
 
     //Returns error if request body has no isAttending parameter
     if (rsvp === undefined) {
-        return res.status(Constants.BAD_REQUEST).send({ error: "InvalidParams" });
+        return res.status(StatusCode.ClientErrorBadRequest).send({ error: "InvalidParams" });
     }
 
     const payload: JwtPayload = res.locals.payload as JwtPayload;
@@ -153,12 +153,12 @@ rsvpRouter.put("/", strongJwtVerification, async (req: Request, res: Response) =
 
     //Returns error if query is empty
     if (!queryResult) {
-        return res.status(Constants.BAD_REQUEST).send({ error: "UserNotFound" });
+        return res.status(StatusCode.ClientErrorBadRequest).send({ error: "UserNotFound" });
     }
 
     //If the current user has not been accepted, send an error
     if (queryResult.status != DecisionStatus.ACCEPTED) {
-        return res.status(Constants.FORBIDDEN).send({ error: "Forbidden" });
+        return res.status(StatusCode.ClientErrorForbidden).send({ error: "Forbidden" });
     }
 
     //If current user has been accepted, update their RSVP decision to "ACCEPTED"/"DECLINED" acoordingly
@@ -172,9 +172,9 @@ rsvpRouter.put("/", strongJwtVerification, async (req: Request, res: Response) =
     );
 
     if (updatedDecision) {
-        return res.status(Constants.SUCCESS).send(updatedDecision.toObject());
+        return res.status(StatusCode.SuccessOK).send(updatedDecision.toObject());
     } else {
-        return res.status(Constants.INTERNAL_ERROR).send({ error: "InternalError" });
+        return res.status(StatusCode.ServerErrorInternal).send({ error: "InternalError" });
     }
 });