diff --git a/packages/fasta-extension/package.json b/packages/fasta-extension/package.json
index f646d1ff1..5abf60378 100644
--- a/packages/fasta-extension/package.json
+++ b/packages/fasta-extension/package.json
@@ -2,22 +2,37 @@
   "name": "@jupyterlab/fasta-extension",
   "version": "0.17.2",
   "description": "Fasta renderer for JupyterLab",
-  "main": "lib/index.js",
-  "types": "lib/index.d.ts",
   "keywords": [
     "jupyter",
     "jupyterlab",
     "jupyterlab-extension"
   ],
+  "homepage": "https://github.com/jupyterlab/jupyter-renderers",
+  "bugs": {
+    "url": "https://github.com/jupyterlab/jupyter-renderers/issues"
+  },
+  "license": "BSD-3-Clause",
+  "author": "Project Jupyter",
+  "files": [
+    "lib/*.d.ts",
+    "lib/*.js",
+    "style/*.*"
+  ],
+  "main": "lib/index.js",
+  "types": "lib/index.d.ts",
+  "directories": {
+    "lib": "lib/"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/jupyterlab/jupyter-renderers.git"
+  },
   "scripts": {
     "build": "tsc",
     "clean": "rimraf lib",
     "prepack": "npm run clean && npm run build",
     "watch": "tsc -w"
   },
-  "jupyterlab": {
-    "mimeExtension": true
-  },
   "dependencies": {
     "@jupyterlab/rendermime-interfaces": "^1.1.2",
     "@phosphor/messaging": "^1.2.2",
@@ -26,24 +41,9 @@
   },
   "devDependencies": {
     "rimraf": "~2.6.2",
-    "typescript": "~2.9.1"
+    "typescript": "~3.1.1"
   },
-  "files": [
-    "lib/*.d.ts",
-    "lib/*.js",
-    "style/*.*"
-  ],
-  "directories": {
-    "lib": "lib/"
-  },
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/jupyterlab/jupyter-renderers.git"
-  },
-  "author": "Project Jupyter",
-  "license": "BSD-3-Clause",
-  "bugs": {
-    "url": "https://github.com/jupyterlab/jupyter-renderers/issues"
-  },
-  "homepage": "https://github.com/jupyterlab/jupyter-renderers"
+  "jupyterlab": {
+    "mimeExtension": true
+  }
 }
diff --git a/packages/geojson-extension/package.json b/packages/geojson-extension/package.json
index b0a476e32..8d88314c4 100644
--- a/packages/geojson-extension/package.json
+++ b/packages/geojson-extension/package.json
@@ -2,23 +2,36 @@
   "name": "@jupyterlab/geojson-extension",
   "version": "0.17.1",
   "description": "GeoJSON renderer for JupyterLab",
-  "main": "lib/index.js",
-  "types": "lib/index.d.ts",
+  "keywords": [
+    "jupyter",
+    "jupyterlab",
+    "jupyterlab-extension"
+  ],
+  "homepage": "https://github.com/jupyterlab/jupyter-renderers",
+  "bugs": {
+    "url": "https://github.com/jupyterlab/jupyter-renderers/issues"
+  },
+  "license": "BSD-3-Clause",
+  "author": "Project Jupyter",
   "files": [
     "lib/*.d.ts",
     "lib/*.js",
     "style/*.*"
   ],
+  "main": "lib/index.js",
+  "types": "lib/index.d.ts",
   "directories": {
     "lib": "lib/"
   },
-  "keywords": [
-    "jupyter",
-    "jupyterlab",
-    "jupyterlab-extension"
-  ],
-  "jupyterlab": {
-    "mimeExtension": true
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/jupyterlab/jupyter-renderers.git"
+  },
+  "scripts": {
+    "build": "tsc",
+    "clean": "rimraf lib",
+    "prepack": "npm run clean && npm run build",
+    "watch": "tsc -w"
   },
   "dependencies": {
     "@jupyterlab/rendermime-interfaces": "^1.1.2",
@@ -29,22 +42,9 @@
   "devDependencies": {
     "@types/leaflet": "^1.2.0",
     "rimraf": "~2.6.2",
-    "typescript": "~2.9.1"
-  },
-  "scripts": {
-    "build": "tsc",
-    "clean": "rimraf lib",
-    "prepack": "npm run clean && npm run build",
-    "watch": "tsc -w"
+    "typescript": "~3.1.1"
   },
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/jupyterlab/jupyter-renderers.git"
-  },
-  "author": "Project Jupyter",
-  "license": "BSD-3-Clause",
-  "bugs": {
-    "url": "https://github.com/jupyterlab/jupyter-renderers/issues"
-  },
-  "homepage": "https://github.com/jupyterlab/jupyter-renderers"
+  "jupyterlab": {
+    "mimeExtension": true
+  }
 }
diff --git a/packages/katex-extension/package.json b/packages/katex-extension/package.json
index 09a906d8b..9c34bf9d7 100644
--- a/packages/katex-extension/package.json
+++ b/packages/katex-extension/package.json
@@ -43,7 +43,7 @@
   "devDependencies": {
     "@types/katex": "^0.5.0",
     "rimraf": "~2.6.2",
-    "typescript": "~2.9.1"
+    "typescript": "~3.1.1"
   },
   "jupyterlab": {
     "extension": true
diff --git a/packages/mathjax3-extension/package.json b/packages/mathjax3-extension/package.json
index 0d98765b3..ed13aa24c 100644
--- a/packages/mathjax3-extension/package.json
+++ b/packages/mathjax3-extension/package.json
@@ -41,7 +41,7 @@
   },
   "devDependencies": {
     "rimraf": "^2.6.2",
-    "typescript": "~2.9.2"
+    "typescript": "~3.1.1"
   },
   "jupyterlab": {
     "extension": true
diff --git a/packages/plotly-extension/package.json b/packages/plotly-extension/package.json
index 0c1447b67..c46832d7b 100644
--- a/packages/plotly-extension/package.json
+++ b/packages/plotly-extension/package.json
@@ -2,23 +2,36 @@
   "name": "@jupyterlab/plotly-extension",
   "version": "0.17.1",
   "description": "Plotly renderer for JupyterLab",
-  "main": "lib/index.js",
-  "types": "lib/index.d.ts",
+  "keywords": [
+    "jupyter",
+    "jupyterlab",
+    "jupyterlab-extension"
+  ],
+  "homepage": "https://github.com/jupyterlab/jupyter-renderers",
+  "bugs": {
+    "url": "https://github.com/jupyterlab/jupyter-renderers/issues"
+  },
+  "license": "BSD-3-Clause",
+  "author": "Project Jupyter",
   "files": [
     "lib/*.d.ts",
     "lib/*.js",
     "style/*.*"
   ],
+  "main": "lib/index.js",
+  "types": "lib/index.d.ts",
   "directories": {
     "lib": "lib/"
   },
-  "keywords": [
-    "jupyter",
-    "jupyterlab",
-    "jupyterlab-extension"
-  ],
-  "jupyterlab": {
-    "mimeExtension": true
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/jupyterlab/jupyter-renderers.git"
+  },
+  "scripts": {
+    "build": "tsc",
+    "clean": "rimraf lib",
+    "prepack": "npm run clean && npm run build",
+    "watch": "tsc -w"
   },
   "dependencies": {
     "@jupyterlab/rendermime-interfaces": "^1.1.2",
@@ -29,22 +42,9 @@
   "devDependencies": {
     "@types/plotly.js": "^1.28.3",
     "rimraf": "~2.6.2",
-    "typescript": "~2.9.1"
-  },
-  "scripts": {
-    "build": "tsc",
-    "clean": "rimraf lib",
-    "prepack": "npm run clean && npm run build",
-    "watch": "tsc -w"
+    "typescript": "~3.1.1"
   },
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/jupyterlab/jupyter-renderers.git"
-  },
-  "author": "Project Jupyter",
-  "license": "BSD-3-Clause",
-  "bugs": {
-    "url": "https://github.com/jupyterlab/jupyter-renderers/issues"
-  },
-  "homepage": "https://github.com/jupyterlab/jupyter-renderers"
+  "jupyterlab": {
+    "mimeExtension": true
+  }
 }
diff --git a/packages/vega2-extension/package.json b/packages/vega2-extension/package.json
index a024522f3..ed69dbaee 100644
--- a/packages/vega2-extension/package.json
+++ b/packages/vega2-extension/package.json
@@ -38,7 +38,7 @@
   "devDependencies": {
     "@types/node": "~10.3.2",
     "rimraf": "~2.6.2",
-    "typescript": "~2.9.1"
+    "typescript": "~3.1.1"
   },
   "jupyterlab": {
     "mimeExtension": true
diff --git a/packages/vega3-extension/package.json b/packages/vega3-extension/package.json
index 6e412ea52..130105a9d 100755
--- a/packages/vega3-extension/package.json
+++ b/packages/vega3-extension/package.json
@@ -37,7 +37,7 @@
   },
   "devDependencies": {
     "rimraf": "~2.6.2",
-    "typescript": "~2.9.2"
+    "typescript": "~3.1.1"
   },
   "jupyterlab": {
     "mimeExtension": true
diff --git a/yarn.lock b/yarn.lock
index 94a2855c4..069503464 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7958,9 +7958,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@~2.9.1, typescript@~2.9.2:
-  version "2.9.2"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-2.9.2.tgz#1cbf61d05d6b96269244eb6a3bce4bd914e0f00c"
+typescript@~3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.1.tgz#3362ba9dd1e482ebb2355b02dfe8bcd19a2c7c96"
 
 ua-parser-js@^0.7.9:
   version "0.7.18"