diff --git a/ElectronClient/app/app.js b/ElectronClient/app/app.js
index 817619ac4..6ab188bde 100644
--- a/ElectronClient/app/app.js
+++ b/ElectronClient/app/app.js
@@ -354,6 +354,11 @@ class Application extends BaseApplication {
 	}
 
 	updateTray() {
+		// Tray icon (called AppIndicator) doesn't work in Ubuntu
+		// http://www.webupd8.org/2017/04/fix-appindicator-not-working-for.html
+		// Might be fixed in Electron 18.x but no non-beta release yet.
+		if (!shim.isWindows() && !shim.isMac()) return;
+
 		const app = bridge().electronApp();
 
 		if (app.trayShown() === Setting.value('showTrayIcon')) return;
diff --git a/ElectronClient/app/package-lock.json b/ElectronClient/app/package-lock.json
index fbf7301a7..81b0c4ac0 100644
--- a/ElectronClient/app/package-lock.json
+++ b/ElectronClient/app/package-lock.json
@@ -10,18 +10,9 @@
       "integrity": "sha512-+rr4OgeTNrLuJAf09o3USdttEYiXvZshWMkhD6wR9v1ieXH0JM1Q2yT41/cJuJcqiPpSXlM/g3aR+Y5MWQdr0Q==",
       "dev": true,
       "requires": {
-        "7zip-bin-linux": "1.3.1",
-        "7zip-bin-mac": "1.0.1",
         "7zip-bin-win": "2.1.1"
       },
       "dependencies": {
-        "7zip-bin-linux": {
-          "version": "1.3.1",
-          "resolved": "https://registry.npmjs.org/7zip-bin-linux/-/7zip-bin-linux-1.3.1.tgz",
-          "integrity": "sha512-Wv1uEEeHbTiS1+ycpwUxYNuIcyohU6Y6vEqY3NquBkeqy0YhVdsNUGsj0XKSRciHR6LoJSEUuqYUexmws3zH7Q==",
-          "dev": true,
-          "optional": true
-        },
         "7zip-bin-win": {
           "version": "2.1.1",
           "resolved": "https://registry.npmjs.org/7zip-bin-win/-/7zip-bin-win-2.1.1.tgz",
@@ -31,18 +22,6 @@
         }
       }
     },
-    "7zip-bin-linux": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/7zip-bin-linux/-/7zip-bin-linux-1.3.1.tgz",
-      "integrity": "sha512-Wv1uEEeHbTiS1+ycpwUxYNuIcyohU6Y6vEqY3NquBkeqy0YhVdsNUGsj0XKSRciHR6LoJSEUuqYUexmws3zH7Q==",
-      "optional": true
-    },
-    "7zip-bin-mac": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/7zip-bin-mac/-/7zip-bin-mac-1.0.1.tgz",
-      "integrity": "sha1-Pmh3i78JJq3GgVlCcHRQXUdVXAI=",
-      "optional": true
-    },
     "7zip-bin-win": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/7zip-bin-win/-/7zip-bin-win-2.1.1.tgz",
@@ -584,8 +563,7 @@
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-      "dev": true
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
     },
     "base-64": {
       "version": "0.1.0",
@@ -630,6 +608,14 @@
         "readable-stream": "2.3.3"
       }
     },
+    "block-stream": {
+      "version": "0.0.9",
+      "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz",
+      "integrity": "sha1-E+v+d4oDIFz+A3UUgeu0szAMEmo=",
+      "requires": {
+        "inherits": "2.0.3"
+      }
+    },
     "bluebird": {
       "version": "3.5.1",
       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.1.tgz",
@@ -747,7 +733,6 @@
       "version": "1.1.8",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.8.tgz",
       "integrity": "sha1-wHshHHyVLsH479Uad+8NHTmQopI=",
-      "dev": true,
       "requires": {
         "balanced-match": "1.0.0",
         "concat-map": "0.0.1"
@@ -892,8 +877,7 @@
     "capture-stack-trace": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/capture-stack-trace/-/capture-stack-trace-1.0.0.tgz",
-      "integrity": "sha1-Sm+gc5nCa7pH8LJJa00PtAjFVQ0=",
-      "dev": true
+      "integrity": "sha1-Sm+gc5nCa7pH8LJJa00PtAjFVQ0="
     },
     "caseless": {
       "version": "0.12.0",
@@ -939,7 +923,6 @@
       "requires": {
         "anymatch": "1.3.2",
         "async-each": "1.0.1",
-        "fsevents": "1.1.3",
         "glob-parent": "2.0.0",
         "inherits": "2.0.3",
         "is-binary-path": "1.0.1",
@@ -951,7 +934,8 @@
     "chownr": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.0.1.tgz",
-      "integrity": "sha1-4qdQQqlVGQi+vSW4Uj1fl2nXkYE="
+      "integrity": "sha1-4qdQQqlVGQi+vSW4Uj1fl2nXkYE=",
+      "dev": true
     },
     "chromium-pickle-js": {
       "version": "0.2.0",
@@ -995,9 +979,9 @@
       "dev": true
     },
     "color": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color/-/color-2.0.1.tgz",
-      "integrity": "sha512-ubUCVVKfT7r2w2D3qtHakj8mbmKms+tThR8gI8zEYCbUBl8/voqFGt3kgBqGwXAopgXybnkuOq+qMYCRrp4cXw==",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/color/-/color-1.0.3.tgz",
+      "integrity": "sha1-5I6DLYXxTvaU+0aIEcLVz+cptV0=",
       "requires": {
         "color-convert": "1.9.1",
         "color-string": "1.5.2"
@@ -1048,8 +1032,7 @@
     "concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
-      "dev": true
+      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
     },
     "concat-stream": {
       "version": "1.6.0",
@@ -1111,7 +1094,6 @@
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/create-error-class/-/create-error-class-3.0.2.tgz",
       "integrity": "sha1-Br56vvlHo/FKMP1hBnHUAbyot7Y=",
-      "dev": true,
       "requires": {
         "capture-stack-trace": "1.0.0"
       }
@@ -1210,14 +1192,6 @@
       "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
       "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU="
     },
-    "decompress-response": {
-      "version": "3.3.0",
-      "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-3.3.0.tgz",
-      "integrity": "sha1-gKTdMjdIOEv6JICDYirt7Jgq3/M=",
-      "requires": {
-        "mimic-response": "1.0.0"
-      }
-    },
     "deep-equal": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/deep-equal/-/deep-equal-1.0.1.tgz",
@@ -1254,11 +1228,6 @@
         "repeating": "2.0.1"
       }
     },
-    "detect-libc": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-0.2.0.tgz",
-      "integrity": "sha1-R/31ZzSKF+wl/L8LnkRjSKdvn7U="
-    },
     "dmg-builder": {
       "version": "2.1.6",
       "resolved": "https://registry.npmjs.org/dmg-builder/-/dmg-builder-2.1.6.tgz",
@@ -1309,8 +1278,7 @@
     "duplexer3": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/duplexer3/-/duplexer3-0.1.4.tgz",
-      "integrity": "sha1-7gHdHKwO08vH/b6jfcCo8c4ALOI=",
-      "dev": true
+      "integrity": "sha1-7gHdHKwO08vH/b6jfcCo8c4ALOI="
     },
     "ecc-jsbn": {
       "version": "0.1.1",
@@ -2038,910 +2006,17 @@
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
-      "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
-      "dev": true
+      "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8="
     },
-    "fsevents": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.1.3.tgz",
-      "integrity": "sha512-WIr7iDkdmdbxu/Gh6eKEZJL6KPE74/5MEsf2whTOFNxbIoIixogroLdKYqB6FDav4Wavh/lZdzzd3b2KxIXC5Q==",
-      "dev": true,
-      "optional": true,
+    "fstream": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.11.tgz",
+      "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
       "requires": {
-        "nan": "2.7.0",
-        "node-pre-gyp": "0.6.39"
-      },
-      "dependencies": {
-        "abbrev": {
-          "version": "1.1.0",
-          "bundled": true,
-          "dev": true,
-          "optional": true
-        },
-        "ajv": {
-          "version": "4.11.8",
-          "bundled": true,
-          "dev": true,
-          "optional": true,
-          "requires": {
-            "co": "4.6.0",
-            "json-stable-stringify": "1.0.1"
-          }
-        },
-        "ansi-regex": {
-          "version": "2.1.1",
-          "bundled": true,
-          "dev": true
-        },
-        "aproba": {
-          "version": "1.1.1",
-          "bundled": true,
-          "dev": true,
-          "optional": true
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-        "are-we-there-yet": {
-          "version": "1.1.4",
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-          "dev": true,
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-          "dev": true,
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-          "version": "0.2.0",
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-          "bundled": true,
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-      "integrity": "sha512-RkE9rGPHcxYZ/baYmgJtOSM63vH0Vyq+ma5TijBcLla41SWlh8t6XYIGMR/oeZcmr+/G8k+zrClkkVrtnQ0esg==",
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-        "once": "1.4.0",
-        "simple-concat": "1.0.0"
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       "resolved": "https://registry.npmjs.org/simple-swizzle/-/simple-swizzle-0.2.2.tgz",
@@ -5892,15 +4900,13 @@
       "integrity": "sha1-Kb9hXUqnEhvdiYsi1LP5vE4qoD0="
     },
     "tar": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/tar/-/tar-3.2.1.tgz",
-      "integrity": "sha512-ZSzds1E0IqutvMU8HxjMaU8eB7urw2fGwTq88ukDOVuUIh0656l7/P7LiVPxhO5kS4flcRJQk8USG+cghQbTUQ==",
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.1.tgz",
+      "integrity": "sha1-jk0qJWwOIYXGsYrWlK7JaLg8sdE=",
       "requires": {
-        "chownr": "1.0.1",
-        "minipass": "2.2.1",
-        "minizlib": "1.0.4",
-        "mkdirp": "0.5.1",
-        "yallist": "3.0.2"
+        "block-stream": "0.0.9",
+        "fstream": "1.0.11",
+        "inherits": "2.0.3"
       }
     },
     "tar-fs": {
@@ -6018,8 +5024,7 @@
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       "resolved": "https://registry.npmjs.org/timed-out/-/timed-out-4.0.1.tgz",
-      "integrity": "sha1-8y6srFoXW+ol1/q1Zas+2HQe9W8=",
-      "dev": true
+      "integrity": "sha1-8y6srFoXW+ol1/q1Zas+2HQe9W8="
     },
     "to-fast-properties": {
       "version": "1.0.3",
@@ -6178,7 +5183,6 @@
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       "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-1.0.0.tgz",
       "integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM=",
-      "dev": true,
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       }
@@ -6357,11 +5361,6 @@
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       "dev": true
     },
-    "yallist": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.2.tgz",
-      "integrity": "sha1-hFK0u36Dx8GI2AQcGoN8dz1ti7k="
-    },
     "yargs": {
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       "resolved": "https://registry.npmjs.org/yargs/-/yargs-10.0.3.tgz",
diff --git a/ElectronClient/app/package.json b/ElectronClient/app/package.json
index 58c0f09f1..dc47ae35e 100644
--- a/ElectronClient/app/package.json
+++ b/ElectronClient/app/package.json
@@ -34,7 +34,8 @@
       "asar": false
     },
     "linux": {
-      "asar": false
+      "asar": false,
+      "category": "Office"
     }
   },
   "homepage": "https://github.com/laurent22/joplin#readme",
@@ -79,7 +80,7 @@
     "react-dom": "^16.0.0",
     "react-redux": "^5.0.6",
     "redux": "^3.7.2",
-    "sharp": "^0.18.4",
+    "sharp": "^0.17.3",
     "smalltalk": "^2.5.1",
     "sprintf-js": "^1.1.1",
     "sqlite3": "^3.1.13",