diff --git a/web/packages/new/photos/components/WhatsNew.tsx b/web/packages/new/photos/components/WhatsNew.tsx
index b074f8b231..2660e5ede8 100644
--- a/web/packages/new/photos/components/WhatsNew.tsx
+++ b/web/packages/new/photos/components/WhatsNew.tsx
@@ -10,18 +10,9 @@ import {
     useMediaQuery,
 } from "@mui/material";
 import Slide from "@mui/material/Slide";
-import { TransitionProps } from "@mui/material/transitions";
+import type { TransitionProps } from "@mui/material/transitions";
 import React from "react";
 
-const Transition = React.forwardRef(function Transition(
-    props: TransitionProps & {
-        children: React.ReactElement
-    },
-    ref: React.Ref<unknown>,
-) {
-    return <Slide direction="up" ref={ref} {...props} />;
-});
-
 interface WhatsNewProps {
     /** Set this to `true` to show the dialog. */
     open: boolean;
@@ -39,8 +30,8 @@ export const WhatsNew: React.FC<WhatsNewProps> = ({ open, onClose }) => {
     return (
         <Dialog
             {...{ open, fullScreen }}
+            TransitionComponent={SlideTransition}
             maxWidth="xs"
-            TransitionComponent={Transition}
         >
             <DialogTitle>{"What's new"}</DialogTitle>
             <DialogContent>
@@ -68,6 +59,15 @@ export const WhatsNew: React.FC<WhatsNewProps> = ({ open, onClose }) => {
     );
 };
 
+const SlideTransition = React.forwardRef(function Transition(
+    props: TransitionProps & {
+        children: React.ReactElement;
+    },
+    ref: React.Ref<unknown>,
+) {
+    return <Slide direction="up" ref={ref} {...props} />;
+});
+
 const StyledUL = styled("ul")`
     padding-inline: 1rem;
     list-style-type: circle;
diff --git a/web/packages/new/tsconfig.json b/web/packages/new/tsconfig.json
index 912513dea5..954e092ba3 100644
--- a/web/packages/new/tsconfig.json
+++ b/web/packages/new/tsconfig.json
@@ -1,5 +1,9 @@
 {
     "extends": "@/build-config/tsconfig-typecheck.json",
+    "compilerOptions": {
+        /* MUI doesn't play great with exactOptionalPropertyTypes currently. */
+        "exactOptionalPropertyTypes": false
+    },
     "include": [
         ".",
         "../next/global-electron.d.ts",