diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..0e6c238
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Olivier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/manifest.json b/manifest.json
index 2c3d9fb..dddd8e5 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,7 +2,7 @@
 	"id": "waypoint-sidebar",
 	"name": "Waypoint Sidebar",
 	"version": "1.5.1",
-	"minAppVersion": "0.16.3",
+	"minAppVersion": "1.4.4",
 	"description": "Calendar, recent files, and custom bookmarks sidebar.",
 	"author": "Olivier",
 	"isDesktopOnly": false
diff --git a/package.json b/package.json
index ddf10ac..ddbc88d 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,8 @@
 	"main": "main.js",
 	"scripts": {
 		"dev": "node esbuild.config.mjs",
-		"build": "node esbuild.config.mjs production"
+		"typecheck": "node node_modules/typescript/bin/tsc --noEmit",
+		"build": "npm run typecheck && node esbuild.config.mjs production"
 	},
 	"keywords": [],
 	"author": "Olivier",
diff --git a/src/settings-tab.ts b/src/settings-tab.ts
index 2e1174a..22cf6a5 100644
--- a/src/settings-tab.ts
+++ b/src/settings-tab.ts
@@ -1,13 +1,14 @@
-import { Setting, PluginSettingTab, App, Plugin, setIcon } from 'obsidian';
+import { Setting, PluginSettingTab, App, setIcon } from 'obsidian';
+import type WaypointPlugin from 'src/main';
 import { WaypointSettings, DEFAULT_SETTINGS, PeriodNoteSettings } from 'src/settings';
 
 export class WaypointSettingTab extends PluginSettingTab {
-	private plugin: Plugin;
+	private plugin: WaypointPlugin;
 	private settings: WaypointSettings;
 	private onSettingsChange: () => void;
 	private activeTab: 'calendar' | 'periodic' | 'recent' | 'display' | 'about' = 'calendar';
 
-	constructor(app: App, plugin: Plugin, settings: WaypointSettings, onSettingsChange: () => void) {
+	constructor(app: App, plugin: WaypointPlugin, settings: WaypointSettings, onSettingsChange: () => void) {
 		super(app, plugin);
 		this.plugin = plugin;
 		this.settings = settings;
@@ -284,12 +285,12 @@ export class WaypointSettingTab extends PluginSettingTab {
 			);
 	}
 
-	private addSliderSetting(
+	private addSliderSetting<K extends string>(
 		container: HTMLElement,
 		name: string,
 		desc: string,
-		obj: any,
-		key: string,
+		obj: Record<K, number>,
+		key: K,
 		min: number,
 		max: number,
 		step: number,
@@ -313,7 +314,7 @@ export class WaypointSettingTab extends PluginSettingTab {
 	}
 
 	private async saveAndRefresh(): Promise<void> {
-		await (this.plugin as any).saveSettings();
+		await this.plugin.saveSettings();
 		this.onSettingsChange();
 	}
 
diff --git a/tsconfig.json b/tsconfig.json
index 0692ec5..b280ee3 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -15,7 +15,8 @@
 			"DOM",
 			"ES5",
 			"ES6",
-			"ES7"
+			"ES7",
+			"ES2017"
 		],
 		"paths": {
 			"src/*": ["./src/*"]