diff --git a/addons/Dexie.Observable/package-lock.json b/addons/Dexie.Observable/package-lock.json
index 7f5c7fd8b..3e992ba12 100644
--- a/addons/Dexie.Observable/package-lock.json
+++ b/addons/Dexie.Observable/package-lock.json
@@ -53,9 +53,9 @@
       "dev": true
     },
     "agent-base": {
-      "version": "4.2.1",
-      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.2.1.tgz",
-      "integrity": "sha512-JVwXMr9nHYTUXsBFKUqhJwvlcYU/blreOEUkhNR2eXZIvwd+c+o5V4MgDPKWnMS/56awN3TRzIP+KoPn+roQtg==",
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.3.0.tgz",
+      "integrity": "sha512-salcGninV0nPrwpGNn4VTXBb1SOuXQBiqbrNXoeizJsHrsL6ERFM2Ne3JUSBWRE6aeNJI2ROP/WEEIDUiDe3cg==",
       "dev": true,
       "requires": {
         "es6-promisify": "^5.0.0"
@@ -919,6 +919,12 @@
       "integrity": "sha512-mmGt/1pZqYRjMxB1axhTo16/snVZ5krrKkcmMeVKxzECMMXoCgnvTPp10QgHfcbQZw8Dq2jMNG6je4JlWU0gWg==",
       "dev": true
     },
+    "commander": {
+      "version": "2.20.3",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
+      "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
+      "dev": true
+    },
     "component-bind": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/component-bind/-/component-bind-1.0.0.tgz",
@@ -1184,9 +1190,9 @@
       "dev": true
     },
     "es6-promise": {
-      "version": "4.2.6",
-      "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.6.tgz",
-      "integrity": "sha512-aRVgGdnmW2OiySVPUC9e6m+plolMAJKjZnQlCwNSuK5yQ0JN61DZSO1X1Ufd1foqWRAlig0rhduTCHe7sVtK5Q==",
+      "version": "4.2.8",
+      "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.8.tgz",
+      "integrity": "sha512-HJDGx5daxeIvxdBxvG2cb9g4tEvwIk3i8+nhX0yGrYmZUzbkdg8QbDevheDB8gd0//uPj4c1EQua8Q+MViT0/w==",
       "dev": true
     },
     "es6-promisify": {
@@ -2278,12 +2284,12 @@
       }
     },
     "https-proxy-agent": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-2.2.1.tgz",
-      "integrity": "sha512-HPCTS1LW51bcyMYbxUIOO4HEOlQ1/1qRaFWcyxvwaqUS9TY88aoEuHUY33kuAh1YhVVaDQhLZsnPd+XNARWZlQ==",
+      "version": "2.2.4",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-2.2.4.tgz",
+      "integrity": "sha512-OmvfoQ53WLjtA9HeYP9RNrWMJzzAz1JGaSFr1nijg0PVR1JaD/xbJq1mdEIIlxGpXp9eSe/O2LgU9DJmTPd0Eg==",
       "dev": true,
       "requires": {
-        "agent-base": "^4.1.0",
+        "agent-base": "^4.3.0",
         "debug": "^3.1.0"
       },
       "dependencies": {
@@ -2297,9 +2303,9 @@
           }
         },
         "ms": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
-          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==",
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
           "dev": true
         }
       }
@@ -4936,11 +4942,15 @@
       "integrity": "sha512-Gr4p6nFNaoufRIY4NMdpQRNmgxVIGMs4Fcu/ujdYk3nAZqk7supzBE9idmvfZIlH/Cuj//dvi+019qEue9lV0w==",
       "dev": true
     },
-    "uglifyjs": {
-      "version": "2.4.11",
-      "resolved": "https://registry.npmjs.org/uglifyjs/-/uglifyjs-2.4.11.tgz",
-      "integrity": "sha1-NEDWTgRXWViVJEGOtkHGi7kNET4=",
-      "dev": true
+    "uglify-js": {
+      "version": "3.6.5",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.5.tgz",
+      "integrity": "sha512-7L3W+Npia1OCr5Blp4/Vw83tK1mu5gnoIURtT1fUVfQ3Kf8WStWV6NJz0fdoBJZls0KlweruRTLVe6XLafmy5g==",
+      "dev": true,
+      "requires": {
+        "commander": "~2.20.3",
+        "source-map": "~0.6.1"
+      }
     },
     "ultron": {
       "version": "1.1.1",
diff --git a/addons/Dexie.Observable/package.json b/addons/Dexie.Observable/package.json
index d6b28f4f1..8451f752e 100644
--- a/addons/Dexie.Observable/package.json
+++ b/addons/Dexie.Observable/package.json
@@ -64,7 +64,8 @@
       "node -e \"fs.writeFileSync('dist/dexie-observable.d.ts', fs.readFileSync('src/Dexie.Observable.d.ts'))\"",
       "node tools/replaceVersionAndDate.js dist/dexie-observable.d.ts",
       "# Minify the default ES5 UMD module",
-      "uglifyjs dist/dexie-observable.js -m -c -o dist/dexie-observable.min.js --source-map \"filename=dist/dexie-observable.min.js.map\" --in-source-map dist/dexie-observable.js.map"
+      "cd dist",
+      "uglifyjs dexie-observable.js -m -c negate_iife=0 -o dexie-observable.min.js --source-map"
     ],
     "test": [
       "# Build the unit tests (integration tests need no build)",
@@ -91,7 +92,7 @@
     "rollup": "^0.55.5",
     "rollup-plugin-sourcemaps": "^0.4.1",
     "typescript": "^2.8.3",
-    "uglifyjs": "^2.4.10"
+    "uglify-js": "^3.5.6"
   },
   "dependencies": {}
 }
diff --git a/addons/Dexie.Syncable/package-lock.json b/addons/Dexie.Syncable/package-lock.json
index 54d0ab8a3..ac0dfe078 100644
--- a/addons/Dexie.Syncable/package-lock.json
+++ b/addons/Dexie.Syncable/package-lock.json
@@ -53,9 +53,9 @@
       "dev": true
     },
     "agent-base": {
-      "version": "4.2.1",
-      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.2.1.tgz",
-      "integrity": "sha512-JVwXMr9nHYTUXsBFKUqhJwvlcYU/blreOEUkhNR2eXZIvwd+c+o5V4MgDPKWnMS/56awN3TRzIP+KoPn+roQtg==",
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.3.0.tgz",
+      "integrity": "sha512-salcGninV0nPrwpGNn4VTXBb1SOuXQBiqbrNXoeizJsHrsL6ERFM2Ne3JUSBWRE6aeNJI2ROP/WEEIDUiDe3cg==",
       "dev": true,
       "requires": {
         "es6-promisify": "^5.0.0"
@@ -1285,9 +1285,9 @@
       "dev": true
     },
     "es6-promise": {
-      "version": "4.2.6",
-      "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.6.tgz",
-      "integrity": "sha512-aRVgGdnmW2OiySVPUC9e6m+plolMAJKjZnQlCwNSuK5yQ0JN61DZSO1X1Ufd1foqWRAlig0rhduTCHe7sVtK5Q==",
+      "version": "4.2.8",
+      "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.8.tgz",
+      "integrity": "sha512-HJDGx5daxeIvxdBxvG2cb9g4tEvwIk3i8+nhX0yGrYmZUzbkdg8QbDevheDB8gd0//uPj4c1EQua8Q+MViT0/w==",
       "dev": true
     },
     "es6-promisify": {
@@ -2452,12 +2452,12 @@
       }
     },
     "https-proxy-agent": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-2.2.1.tgz",
-      "integrity": "sha512-HPCTS1LW51bcyMYbxUIOO4HEOlQ1/1qRaFWcyxvwaqUS9TY88aoEuHUY33kuAh1YhVVaDQhLZsnPd+XNARWZlQ==",
+      "version": "2.2.4",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-2.2.4.tgz",
+      "integrity": "sha512-OmvfoQ53WLjtA9HeYP9RNrWMJzzAz1JGaSFr1nijg0PVR1JaD/xbJq1mdEIIlxGpXp9eSe/O2LgU9DJmTPd0Eg==",
       "dev": true,
       "requires": {
-        "agent-base": "^4.1.0",
+        "agent-base": "^4.3.0",
         "debug": "^3.1.0"
       },
       "dependencies": {
@@ -2469,12 +2469,6 @@
           "requires": {
             "ms": "^2.1.1"
           }
-        },
-        "ms": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
-          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==",
-          "dev": true
         }
       }
     },
@@ -4934,11 +4928,29 @@
       "integrity": "sha1-PFtv1/beCRQmkCfwPAlGdY92c6Q=",
       "dev": true
     },
-    "uglifyjs": {
-      "version": "2.4.11",
-      "resolved": "https://registry.npmjs.org/uglifyjs/-/uglifyjs-2.4.11.tgz",
-      "integrity": "sha1-NEDWTgRXWViVJEGOtkHGi7kNET4=",
-      "dev": true
+    "uglify-js": {
+      "version": "3.6.5",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.5.tgz",
+      "integrity": "sha512-7L3W+Npia1OCr5Blp4/Vw83tK1mu5gnoIURtT1fUVfQ3Kf8WStWV6NJz0fdoBJZls0KlweruRTLVe6XLafmy5g==",
+      "dev": true,
+      "requires": {
+        "commander": "~2.20.3",
+        "source-map": "~0.6.1"
+      },
+      "dependencies": {
+        "commander": {
+          "version": "2.20.3",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
+          "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
+          "dev": true
+        },
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "dev": true
+        }
+      }
     },
     "ultron": {
       "version": "1.1.1",
diff --git a/addons/Dexie.Syncable/package.json b/addons/Dexie.Syncable/package.json
index 3f6818610..2c4388191 100644
--- a/addons/Dexie.Syncable/package.json
+++ b/addons/Dexie.Syncable/package.json
@@ -64,7 +64,8 @@
       "node -e \"fs.writeFileSync('dist/dexie-syncable.d.ts', fs.readFileSync('src/Dexie.Syncable.d.ts'))\"",
       "node tools/replaceVersionAndDate.js dist/dexie-syncable.d.ts",
       "# Minify the default ES5 UMD module",
-      "uglifyjs dist/dexie-syncable.js -m -c -o dist/dexie-syncable.min.js --source-map dist/dexie-syncable.min.js.map  --in-source-map dist/dexie-syncable.js.map"
+      "cd dist",
+      "uglifyjs dexie-syncable.js -m -c negate_iife=0 -o dexie-syncable.min.js --source-map"
     ]
   },
   "homepage": "http://dexie.org",
@@ -87,6 +88,6 @@
     "rollup": "^0.41.4",
     "rollup-plugin-sourcemaps": "^0.4.1",
     "typescript": "^2.6.2",
-    "uglifyjs": "^2.4.10"
+    "uglify-js": "^3.5.6"
   }
 }