diff --git a/.gitignore b/.gitignore
index d51b580..fb2692d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 api.spec
+package-lock.json
 .venv/
+__pycache__/
 node_modules/
 build/
 dist/
diff --git a/README.md b/README.md
index 54c25e8..a9402aa 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,17 @@
 # Electron as GUI of Python Applications (Updated)
 
+## Resources
+
+[Electron/Python Medium Post](https://medium.com/@abulka/electron-python-4e8c807bfa5e)
+
+[Electron Quickstart](https://github.com/electron/electron-quick-start)
+
+#### Not worth using Angular until proficient in JS
+[Angular/Electron](https://malcoded.com/posts/angular-desktop-electron/)
+
+[More Angular/Electron](https://alligator.io/angular/electron/)
+
+
 ## tl;dr
 
 This post shows how to use Electron as the GUI component of Python applications. (Updated version of one of my previous posts.) The frontend and backend communicate with each other using `zerorpc`. The complete code is on [GitHub repo](https://github.com/fyears/electron-python-example).
@@ -95,7 +107,7 @@ start
 
 ## preparation
 
-Attention: the example could be successfully run on my Windows 10 machine with Python 3.6, Electron 1.7, Node.js v6.
+Attention: the example could be successfully run on my Windows 10 machine with Python 3.6, Electron 1.8.2, Node.js v8.9.4.
 
 We need the python application, `python`, `pip`, `node`, `npm`, available in command line. For using `zerorpc`, we also need the C/C++ compilers (`cc` and `c++` in the command line, and/or MSVC on Windows).
 
@@ -154,8 +166,8 @@ We need to configure the `package.json`, especially the `main` entry:
     "zerorpc": "git+https://github.com/fyears/zerorpc-node.git"
   },
   "devDependencies": {
-    "electron": "^1.7.6",
-    "electron-packager": "^9.0.1"
+    "electron": "1.7.12",
+    "electron-packager": "11.0.0"
   }
 }
 ```
@@ -180,11 +192,15 @@ Remove-Item .\node_modules -Force -Recurse -ErrorAction Ignore
 
 Then run `npm`:
 
+**Very important to adjust the target version!!! Ensure that the version in `package.json` and th e command below are the same!!!**
+
+When in doubt, **clean the cache using the command line above** and install every required packages below again.
+
 ```bash
-# 1.7.6 is the version of electron
+# 1.7.12 is the version of electron
 # It's very important to set the electron version correctly!!!
 # check out the version value in your package.json
-npm install --runtime=electron --target=1.7.6
+npm install --verbose --runtime=electron --target=1.7.12
 
 # verify the electron binary and its version by opening it
 ./node_modules/.bin/electron
@@ -196,6 +212,18 @@ The `npm install` will install `zerorpc-node` from [my fork](https://github.com/
 
 All libraries should be fine now.
 
+#### optional: slow Internet connection
+
+If you want to use a faster npm mirror, **before running `npm install`, try to edit `~/.npmrc` (Linux / OS X) or `%USERPROFILE%/.npmrc`, add these lines (adapt them to your favourite mirrors):
+
+```
+registry=https://registry.npm.taobao.org
+disturl=https://npm.taobao.org/dist
+electron_mirror=https://npm.taobao.org/mirrors/electron/
+```
+
+Then run `npm install <...>` as described in the previous section.
+
 #### optional: building from sources
 
 If the above installation causes any errors **even while setting the electron version correctly**, we may have to build the packages from sources.
@@ -214,7 +242,7 @@ Set the environment variables for Linux (Ubuntu) / OS X / Windows:
 # On Linux / OS X:
 
 # env
-export npm_config_target=1.7.6 # electron version
+export npm_config_target=1.7.12 # electron version
 export npm_config_runtime=electron
 export npm_config_disturl=https://atom.io/download/electron
 export npm_config_build_from_source=true
@@ -229,7 +257,7 @@ npm config ls
 ```powershell
 # On Window PowerShell (not cmd.exe!!!)
 
-$env:npm_config_target="1.7.6" # electron version
+$env:npm_config_target="1.7.12" # electron version
 $env:npm_config_runtime="electron"
 $env:npm_config_disturl="https://atom.io/download/electron"
 $env:npm_config_build_from_source="true"
@@ -456,12 +484,14 @@ User [PyInstaller](http://www.pyinstaller.org/).
 Run the following in the terminal:
 
 ```bash
-pyinstaller pycalc/api.py --distpath pycalcdist
+pyinstaller pycalc/api.py --distpath pycalcdist --exclude-module FixTk --exclude-module tcl --exclude-module tk --exclude-module _tkinter --exclude-module tkinter --exclude-module Tkinter --exclude-module PyQt5 --exclude-module matplotlib
 
 rm -rf build/
 rm -rf api.spec
 ```
 
+The multiple `--exclude-module MODULE_NAME` is for reducing the possible size. See [PyInstaller options document](https://pythonhosted.org/PyInstaller/usage.html#options) for more details. I do not explain the usage in details here.
+
 If everything goes well, the `pycalcdist/api/` folder should show up, as well as the executable inside that folder. This is the complete independent Python executable that could be moved to somewhere else.
 
 **Attention: the independent Python executable has to be generated!** Because the target machine we want to distribute to may not have correct Python shell and/or required Python libraries. It's almost impossible to just copy the Python source codes.
@@ -540,7 +570,7 @@ In the end, run [`electron-packager`](https://github.com/electron-userland/elect
 # and copy the output into the correct distributable Electron folder...
 
 ./node_modules/.bin/electron-packager . --overwrite --ignore="pycalc$" --ignore="\.venv" --ignore="old-post-backup"
-## Packaging app for platform win32 x64 using electron v1.7.6
+## Packaging app for platform win32 x64 using electron v1.7.12
 ## Wrote new app to ./pretty-calculator-win32-x64
 ```
 
diff --git a/package.json b/package.json
index 41a50d2..2eb2afa 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pretty-calculator",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "A minimal Electron and Python - based calculator ",
   "main": "main.js",
   "scripts": {
@@ -19,7 +19,7 @@
     "zerorpc": "git+https://github.com/fyears/zerorpc-node.git"
   },
   "devDependencies": {
-    "electron": "^1.7.6",
-    "electron-packager": "^9.0.1"
+    "electron": "1.7.12",
+    "electron-packager": "11.0.0"
   }
 }