diff --git a/README.md b/README.md
index 08055e7..951599e 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # py4web-pyinstaller
 How to make py4web binaries for Windows and MacOS with PY3 and PyInstaller
 
-The binaries contain Python 64 bit version 3.7.4 with all the needed modules
+The binaries contain Python 64 bit version 3.8.6 with all the needed modules
 and the py4web in the specified version. You don't need anything else to run them!
 
 
diff --git a/README_mac.md b/README_mac.md
index 345d1b2..10238c2 100644
--- a/README_mac.md
+++ b/README_mac.md
@@ -1,12 +1,13 @@
 ## Full MacOs build recipe
-1. Install Python 3 and py4web as usual. I've done it in Desktop/py4web with the "Try me (from source)" procedure and Python 3.7.4. It's better to use venv or a full VM ...
+1. Install Python 3 and py4web as usual. I've done it in Desktop/py4web with the "Try me (from source)" procedure and Python 3.8.6. It's better to use venv or a full VM ...
 
 1. install PyInstaller with:
-sudo -H pip3 install --upgrade pyinstaller  (I've got PyInstaller-3.6.tar.gz )
+sudo -H pip3 install --upgrade pyinstaller  (I've got PyInstaller-4.1.tar.gz )
 
-1. copy build_py4web.py and py4web.win.spec from this repository to Desktop/py4web
+1. copy extras, build_py4web.py and py4web.win.spec from this repository to Desktop/py4web
 
-1. (optional, for having a full working interactive shell) change the fake site.py module included within the PyInstaller installation with the content of the files web2py.site_37.py from https://github.com/nicozanf/web2py-pyinstaller/blob/master/web2py.site_37.py - see comments inside that file for details
+1. (optional, for having a full working interactive shell) change the fake site.py module included within the PyInstaller installation with the content of the files web2py.site_37.py
+   from https://github.com/nicozanf/web2py-pyinstaller/blob/master/web2py.site_37.py - see comments inside that file for details. It work for Python 3.8, too.
 
 1. open a Terminal and go to Desktop\py4web. Run:
 
@@ -14,3 +15,11 @@ python3 build_py4web.py
 
 If everything goes fine, you'll obtain the 64 bit binary build zipped as Desktop/py4web\py4web_osx.zip.
 
+
+## NOTE:
+
+There is a bug (see https://github.com/pyinstaller/pyinstaller/issues/5062) with Pyinstaller and Python >= 3.7.6. After compiling, you need to run on the compiled code:   
+
+$ sudo codesign --remove-signature Python
+
+
diff --git a/README_win.md b/README_win.md
index c54702a..257fec8 100644
--- a/README_win.md
+++ b/README_win.md
@@ -7,11 +7,12 @@ the free and official "Visual C++ Redistributable for Visual Studio" as describe
 ## Full Windows build recipe
 
 
-1. Install Python 3 and py4web as usual. I've done it in C:\py4web\ with the "Try me (from source)" procedure and Python 3.7.4. It's better to use venv or a full VM ...
+1. Install Python 3 and py4web as usual. I've done it in C:\py4web\ with the "Try me (from source)" procedure and Python 3.8.6. It's better to use venv or a full VM ...
 1. install PyInstaller with:  
-        pip install  --upgrade pyinstaller  (I've got PyInstaller-3.6.tar.gz )  
-1. copy build_py4web.py and py4web.win.spec from this repository to C:\py4web\
-1. (optional, for having a full working interactive shell) change the fake site.py module included within the PyInstaller installation with the content of the files web2py.site_37.py from https://github.com/nicozanf/web2py-pyinstaller/blob/master/web2py.site_37.py - see comments inside that file for details
+        pip install  --upgrade pyinstaller  (I've got PyInstaller-4.1.tar.gz )  
+1. copy extras, build_py4web.py and py4web.win.spec from this repository to C:\py4web\
+1. (optional, for having a full working interactive shell) change the fake site.py module included within the PyInstaller installation with the content of the files web2py.site_37.py 
+   from https://github.com/nicozanf/web2py-pyinstaller/blob/master/web2py.site_37.py - see comments inside that file for details. It work for Python 3.8, too.
 1. open a CMD and go to C:\py4web. Run:
 
     python build_py4web.py
@@ -22,4 +23,4 @@ If you try to run it in a 32 bit Windows system, you'll correctly get a 'web2py.
 
 ## Current problems
 
-It seems that the Edge browser doesn't like the binary in my VM, and all the VM gets stuck for minutes at the first run. Other browsers are fine...
+None
\ No newline at end of file
diff --git a/all_binaries/py4web_osx_1.20201206.1.zip b/all_binaries/py4web_osx_1.20201206.1.zip
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diff --git a/all_binaries/py4web_win_1.20201206.1.zip b/all_binaries/py4web_win_1.20201206.1.zip
new file mode 100644
index 0000000..aec8953
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