diff --git a/app/updater.ts b/app/updater.ts
index 39ba2870..11f17d8e 100644
--- a/app/updater.ts
+++ b/app/updater.ts
@@ -76,21 +76,16 @@ export default (win: BrowserWindow) => {
 
   const {rpc} = win;
 
-  const onupdate = (
-    ev: Event,
-    releaseNotes: string,
-    releaseName: string,
-    date: Date,
-    updateUrl: string,
-    onQuitAndInstall: any
-  ) => {
+  const onupdate = (ev: Event, releaseNotes: string, releaseName: string, date: Date, updateUrl: string) => {
     const releaseUrl = updateUrl || `https://github.com/vercel/hyper/releases/tag/${releaseName}`;
-    rpc.emit('update available', {releaseNotes, releaseName, releaseUrl, canInstall: !!onQuitAndInstall});
+    rpc.emit('update available', {releaseNotes, releaseName, releaseUrl, canInstall: !isLinux});
   };
 
-  const eventName: any = isLinux ? 'update-available' : 'update-downloaded';
-
-  autoUpdater.on(eventName, onupdate);
+  if (isLinux) {
+    autoUpdater.on('update-available', onupdate);
+  } else {
+    autoUpdater.on('update-downloaded', onupdate);
+  }
 
   rpc.once('quit and install', () => {
     autoUpdater.quitAndInstall();
@@ -111,6 +106,10 @@ export default (win: BrowserWindow) => {
   });
 
   win.on('close', () => {
-    autoUpdater.removeListener(eventName, onupdate);
+    if (isLinux) {
+      autoUpdater.removeListener('update-available', onupdate);
+    } else {
+      autoUpdater.removeListener('update-downloaded', onupdate);
+    }
   });
 };
diff --git a/cli/api.ts b/cli/api.ts
index cac531a3..bc1bafc4 100644
--- a/cli/api.ts
+++ b/cli/api.ts
@@ -30,7 +30,7 @@ const fileName =
 function memoize<T extends (...args: any[]) => any>(fn: T): T {
   let hasResult = false;
   let result: any;
-  return ((...args: any[]) => {
+  return ((...args: Parameters<T>) => {
     if (!hasResult) {
       result = fn(...args);
       hasResult = true;
diff --git a/cli/index.ts b/cli/index.ts
index eaa46b25..598d4220 100644
--- a/cli/index.ts
+++ b/cli/index.ts
@@ -191,8 +191,10 @@ const main = (argv: string[]) => {
     version: false,
     mri: {
       boolean: ['v', 'verbose']
-    }
-  } as any);
+    },
+    mainColor: 'yellow',
+    subColor: 'dim'
+  });
 
   if (commandPromise) {
     return commandPromise;
diff --git a/lib/actions/ui.ts b/lib/actions/ui.ts
index 1005e2be..a310b682 100644
--- a/lib/actions/ui.ts
+++ b/lib/actions/ui.ts
@@ -31,7 +31,7 @@ import parseUrl from 'parse-url';
 import {HyperState, HyperDispatch, HyperActions, ITermGroups} from '../hyper';
 import {stat, Stats} from 'fs';
 
-export function openContextMenu(uid: string, selection: any) {
+export function openContextMenu(uid: string, selection: string) {
   return (dispatch: HyperDispatch, getState: () => HyperState) => {
     dispatch({
       type: UI_CONTEXTMENU_OPEN,
diff --git a/lib/components/split-pane.tsx b/lib/components/split-pane.tsx
index 8ca6cd8c..1ab047d5 100644
--- a/lib/components/split-pane.tsx
+++ b/lib/components/split-pane.tsx
@@ -24,13 +24,14 @@ export default class SplitPane extends React.PureComponent<SplitPaneProps, {drag
     }
   }
 
-  setupPanes(ev: any) {
-    this.panes = Array.from(ev.target.parentNode.childNodes);
-    this.paneIndex = this.panes.indexOf(ev.target);
+  setupPanes(ev: React.MouseEvent<HTMLDivElement>) {
+    const target = ev.target as HTMLDivElement;
+    this.panes = Array.from(target.parentElement?.children || []);
+    this.paneIndex = this.panes.indexOf(target);
     this.paneIndex -= Math.ceil(this.paneIndex / 2);
   }
 
-  handleAutoResize = (ev: React.MouseEvent) => {
+  handleAutoResize = (ev: React.MouseEvent<HTMLDivElement>) => {
     ev.preventDefault();
 
     this.setupPanes(ev);
@@ -46,8 +47,7 @@ export default class SplitPane extends React.PureComponent<SplitPaneProps, {drag
     this.props.onResize(sizes_);
   };
 
-  handleDragStart = (ev: any) => {
-    // eslint-disable-next-line @typescript-eslint/no-unsafe-call
+  handleDragStart = (ev: React.MouseEvent<HTMLDivElement>) => {
     ev.preventDefault();
     this.setState({dragging: true});
     window.addEventListener('mousemove', this.onDrag);
@@ -64,10 +64,10 @@ export default class SplitPane extends React.PureComponent<SplitPaneProps, {drag
       this.d3 = 'clientX';
     }
 
-    this.dragTarget = ev.target;
+    const target = ev.target as HTMLDivElement;
+    this.dragTarget = target;
     this.dragPanePosition = this.dragTarget.getBoundingClientRect()[this.d2];
-    // eslint-disable-next-line @typescript-eslint/no-unsafe-call
-    this.panesSize = ev.target.parentNode.getBoundingClientRect()[this.d1];
+    this.panesSize = target.parentElement!.getBoundingClientRect()[this.d1];
     this.setupPanes(ev);
   };
 
diff --git a/lib/constants/sessions.ts b/lib/constants/sessions.ts
index df96b59e..5deb28b0 100644
--- a/lib/constants/sessions.ts
+++ b/lib/constants/sessions.ts
@@ -41,6 +41,7 @@ export interface SessionAddDataAction {
 }
 export interface SessionPtyDataAction {
   type: typeof SESSION_PTY_DATA;
+  data: string;
   uid: string;
   now: number;
 }
diff --git a/lib/containers/terms.ts b/lib/containers/terms.ts
index 612116fd..409f2c2c 100644
--- a/lib/containers/terms.ts
+++ b/lib/containers/terms.ts
@@ -85,7 +85,7 @@ const mapDispatchToProps = (dispatch: HyperDispatch) => {
       dispatch(closeSearch(uid));
     },
 
-    onContextMenu(uid: string, selection: any) {
+    onContextMenu(uid: string, selection: string) {
       dispatch(setActiveSession(uid));
       dispatch(openContextMenu(uid, selection));
     }
diff --git a/lib/reducers/ui.ts b/lib/reducers/ui.ts
index a5edc7bd..19dc12a3 100644
--- a/lib/reducers/ui.ts
+++ b/lib/reducers/ui.ts
@@ -29,7 +29,7 @@ const isWindows = ['Windows', 'Win16', 'Win32', 'WinCE'].includes(navigator.plat
 const allowedCursorShapes = new Set(['BEAM', 'BLOCK', 'UNDERLINE']);
 const allowedCursorBlinkValues = new Set([true, false]);
 const allowedBells = new Set(['SOUND', 'false', false]);
-const allowedHamburgerMenuValues = new Set([true, false]);
+const allowedHamburgerMenuValues = new Set([true, false, '']);
 const allowedWindowControlsValues = new Set([true, false, 'left']);
 
 // Populate `config-default.js` from this :)
@@ -239,7 +239,7 @@ const reducer: IUiReducer = (state = initial, action) => {
               ret.modifierKeys = config.modifierKeys;
             }
 
-            if (allowedHamburgerMenuValues.has(config.showHamburgerMenu as any)) {
+            if (allowedHamburgerMenuValues.has(config.showHamburgerMenu)) {
               ret.showHamburgerMenu = config.showHamburgerMenu;
             }
 
diff --git a/lib/store/write-middleware.ts b/lib/store/write-middleware.ts
index bd0855d5..76170a9b 100644
--- a/lib/store/write-middleware.ts
+++ b/lib/store/write-middleware.ts
@@ -1,10 +1,11 @@
+import {HyperActions, HyperState} from '../hyper';
 import terms from '../terms';
-import {Middleware} from 'redux';
+import {Dispatch, Middleware} from 'redux';
 
 // the only side effect we perform from middleware
 // is to write to the react term instance directly
 // to avoid a performance hit
-const writeMiddleware: Middleware = () => (next) => (action) => {
+const writeMiddleware: Middleware<{}, HyperState, Dispatch<HyperActions>> = () => (next) => (action: HyperActions) => {
   if (action.type === 'SESSION_PTY_DATA') {
     const term = terms[action.uid];
     if (term) {
diff --git a/lib/utils/effects.ts b/lib/utils/effects.ts
index 4ccdb7b1..7d5b4039 100644
--- a/lib/utils/effects.ts
+++ b/lib/utils/effects.ts
@@ -1,3 +1,5 @@
+import {Dispatch, Middleware} from 'redux';
+import {HyperActions, HyperState} from '../hyper';
 /**
  * Simple redux middleware that executes
  * the `effect` field if provided in an action
@@ -6,8 +8,7 @@
  * defer or add to existing side effects at will
  * as the result of an action being triggered.
  */
-import {Middleware} from 'redux';
-const effectsMiddleware: Middleware = () => (next) => (action) => {
+const effectsMiddleware: Middleware<{}, HyperState, Dispatch<HyperActions>> = () => (next) => (action) => {
   const ret = next(action);
   if (action.effect) {
     // eslint-disable-next-line @typescript-eslint/no-unsafe-call
diff --git a/lib/utils/plugins.ts b/lib/utils/plugins.ts
index c9bc2493..5f7fecab 100644
--- a/lib/utils/plugins.ts
+++ b/lib/utils/plugins.ts
@@ -9,7 +9,7 @@ import {basename} from 'path';
 // patching Module._load
 // so plugins can `require` them without needing their own version
 // https://github.com/vercel/hyper/issues/619
-import React, {PureComponent} from 'react';
+import React, {ComponentType, PureComponent} from 'react';
 import ReactDOM from 'react-dom';
 import Notification from '../components/notification';
 import notify from './notify';
@@ -24,9 +24,10 @@ import {
   TabsProps,
   TermGroupOwnProps,
   TermProps,
-  Assignable
+  Assignable,
+  HyperActions
 } from '../hyper';
-import {Middleware} from 'redux';
+import {Dispatch, Middleware} from 'redux';
 import {ObjectTypedKeys} from './object';
 import IPCChildProcess from './ipc-child-process';
 import ChildProcess from 'child_process';
@@ -456,10 +457,10 @@ export function getTabProps<T extends Assignable<TabProps, T>>(tab: any, parentP
 export function connect<stateProps extends {}, dispatchProps>(
   stateFn: (state: HyperState) => stateProps,
   dispatchFn: (dispatch: HyperDispatch) => dispatchProps,
-  c: any,
+  c: null | undefined,
   d: Options = {}
 ) {
-  return (Class: any, name: keyof typeof connectors) => {
+  return (Class: ComponentType<any>, name: keyof typeof connectors) => {
     return reduxConnect<stateProps, dispatchProps, any, HyperState>(
       (state) => {
         let ret = stateFn(state);
@@ -570,7 +571,7 @@ export function decorateSessionsReducer(fn: ISessionReducer) {
 }
 
 // redux middleware generator
-export const middleware: Middleware = (store) => (next) => (action) => {
+export const middleware: Middleware<{}, HyperState, Dispatch<HyperActions>> = (store) => (next) => (action) => {
   const nextMiddleware = (remaining: Middleware[]) => (action_: any) =>
     remaining.length ? remaining[0](store)(nextMiddleware(remaining.slice(1)))(action_) : next(action_);
   nextMiddleware(middlewares)(action);
diff --git a/lib/v8-snapshot-util.ts b/lib/v8-snapshot-util.ts
index 4b3dd804..be6dba81 100644
--- a/lib/v8-snapshot-util.ts
+++ b/lib/v8-snapshot-util.ts
@@ -2,7 +2,7 @@ if (typeof snapshotResult !== 'undefined') {
   const Module = __non_webpack_require__('module');
   const originalLoad: (module: string, ...args: any[]) => any = Module._load;
 
-  Module._load = function _load(module: string, ...args: any[]): NodeModule {
+  Module._load = function _load(module: string, ...args: unknown[]): NodeModule {
     let cachedModule = snapshotResult.customRequire.cache[module];
 
     if (cachedModule) return cachedModule.exports;