diff --git a/web/src/portico/team.ts b/web/src/portico/team.ts
index 55e6e512cd..61795f29ab 100644
--- a/web/src/portico/team.ts
+++ b/web/src/portico/team.ts
@@ -74,9 +74,7 @@ export type Contributor = {
     email?: string | undefined;
     github_username?: string | undefined;
     name?: string | undefined;
-} & {
-    [K in RepositoryName]?: number;
-};
+} & Partial<Record<RepositoryName, number>>;
 type ContributorData = {
     avatar: string;
     email?: string | undefined;
diff --git a/web/src/scheduled_messages.ts b/web/src/scheduled_messages.ts
index 8c7c9f1bcd..4af844552e 100644
--- a/web/src/scheduled_messages.ts
+++ b/web/src/scheduled_messages.ts
@@ -14,7 +14,7 @@ type TimeKey =
     | "tomorrow_four_pm"
     | "monday_nine_am";
 
-type SendOption = {[key in TimeKey]?: {text: string; stamp: number}};
+type SendOption = Partial<Record<TimeKey, {text: string; stamp: number}>>;
 
 export const MINIMUM_SCHEDULED_MESSAGE_DELAY_SECONDS = 5 * 60;
 
diff --git a/web/src/settings_config.ts b/web/src/settings_config.ts
index 77bac3e0bf..c2bdfc552b 100644
--- a/web/src/settings_config.ts
+++ b/web/src/settings_config.ts
@@ -145,12 +145,13 @@ export const web_home_view_values = {
 };
 
 type ColorScheme = "automatic" | "dark" | "light";
-export type ColorSchemeValues = {
-    [key in ColorScheme]: {
+export type ColorSchemeValues = Record<
+    ColorScheme,
+    {
         code: number;
         description: string;
-    };
-};
+    }
+>;
 
 export const color_scheme_values = {
     automatic: {