diff --git a/bin/www b/bin/www
index 7f7b958..5c2349c 100755
--- a/bin/www
+++ b/bin/www
@@ -1,4 +1,4 @@
-#!/usr/bin/env node
+#!/usr/bin/env node --trace-warnings
 
 if (process.env.NODE_ENV == null)
   process.env.NODE_ENV = 'development';
diff --git a/config/raspberrypi/README.md b/config/raspberrypi/README.md
index 454f4f8..6e8c49e 100644
--- a/config/raspberrypi/README.md
+++ b/config/raspberrypi/README.md
@@ -1,4 +1,4 @@
-# Setup on Raspberry Pi 3
+# Setup on Raspberry Pi 4B
 
 The [Raspberry Pi](https://www.raspberrypi.org/) is a popular line of single-board computers that can run a variety of
 operating systems.
@@ -12,7 +12,7 @@ This package runs on the Debian Linux distro named "Raspbian" provided by Raspbe
 ### 1.1. Install Linux
 
 Download from the [Raspoberry Pi Downloads page](https://www.raspberrypi.org/downloads/raspbian/)
-the "Raspbian Stretch with Desktop" and burn the image to a microSDHC card.
+the "Raspberry Pi OS with Desktop" and burn the image to a microSDHC card.
 Insert the card into the slot on the bottom of the Pi.
 
 Plug the HDMI port into your TV and attach a keyboard and mouse to the USB ports.
@@ -56,7 +56,7 @@ hostname on the *System* tab.
 ### 1.5 Display Resolution
 
 While there on the *System* tab, make sure the resolution is correct for your TV.
-This will generally be "1920x1080 60Hz" (1080p).
+This will generally be "3840×2160 60Hz" (4K).
 
 ## 2. Install the Server
 
@@ -68,7 +68,7 @@ The server needs at least version 6 of node (with ES6 support). Check which vers
 with `node --version`. If this prints out anything less than v6.11.0, upgrade to something less ancient.
 Execute in a terminal:
 ```
-curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
+curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -
 sudo apt install nodejs
 ```
 
@@ -109,13 +109,15 @@ sudo apt-get install unclutter
 
 ### 3.2. Start Chromium Kiosk
 
-[From these instructions](https://www.danpurdy.co.uk/web-development/raspberry-pi-kiosk-screen-tutorial/),
+[From these instructions](https://www.danpurdy.co.uk/web-development/raspberry-pi-kiosk-screen-tutorial/):
+```
+mkdir -p ~/.config/lxsession/LXDE-pi
+```
+
 edit `~/.config/lxsession/LXDE-pi/autostart` to look like this:
 ```
 @lxpanel --profile LXDE-pi
 @pcmanfm --desktop --profile LXDE-pi
-# @xscreensaver -no-splash
-# @point-rpi
 
 @xset s off
 @xset -dpms
@@ -124,7 +126,7 @@ edit `~/.config/lxsession/LXDE-pi/autostart` to look like this:
 @unclutter -idle 0
 @/usr/lib/chromium-browser/chromium-browser --noerrdialogs --kiosk http://localhost/frame.html
 ```
-(Remove or comment out the "@xscreensaver" and "@point-rpi" lines and add the lines starting with "@xset".)
+(Remove or comment out the "@xscreensaver" and "@point-rpi" lines if any and add the lines starting with "@xset".)
 
 ## 4. Reboot
 
diff --git a/index.js b/index.js
index 86c4ae3..975c661 100644
--- a/index.js
+++ b/index.js
@@ -146,7 +146,6 @@ router.get(['/', '/index.html', '/manage', '/manage.html'], function(req, res, n
     });
     params.accept = es;
   }
-  console.log(params);
 
   // generate the page
   var parts = [];
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..25dc493
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1172 @@
+{
+  "name": "pictureframe",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
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+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "ansi-regex": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
+    },
+    "append-field": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/append-field/-/append-field-1.0.0.tgz",
+      "integrity": "sha1-HjRA6RXwsSA9I3SOeO3XubW0PlY="
+    },
+    "aproba": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/aproba/-/aproba-1.2.0.tgz",
+      "integrity": "sha512-Y9J6ZjXtoYh8RnXVCMOU/ttDmk1aBjunq9vO0ta5x85WDQiQfUF9sIPBITdbiiIVcBo03Hi3jMxigBtsddlXRw=="
+    },
+    "are-we-there-yet": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz",
+      "integrity": "sha512-5hYdAkZlcG8tOLujVDTgCT+uPX0VnpAH28gWsLfzpXYm7wP6mp5Q/gYyR7YQ0cKVJcXJnl3j2kpBan13PtQf6w==",
+      "requires": {
+        "delegates": "^1.0.0",
+        "readable-stream": "^2.0.6"
+      },
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+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
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+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+    },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    },
+    "wide-align": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
+      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
+      "requires": {
+        "string-width": "^1.0.2 || 2"
+      }
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+    },
+    "xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
+    },
+    "yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+    }
+  }
+}
diff --git a/package.json b/package.json
index 3b50f81..ac4ac64 100644
--- a/package.json
+++ b/package.json
@@ -17,12 +17,12 @@
   "dependencies": {
     "cookie-parser": "^1.4.3",
     "express": "^4.16.2",
-    "express-sse": "^0.4.1",
+    "express-sse": "^0.5.3",
     "jasmine": "^2.8.0",
     "morgan": "^1.9.0",
     "multer": "^1.3.0",
     "serve-favicon": "^2.4.5",
-    "sharp": "^0.18.4"
+    "sharp": "^0.28.3"
   },
   "devDependencies": {
     "jasmine": "^2.5.2"