diff --git a/docs/Dependencies.txt b/docs/Dependencies.txt
index f5a0b339..a3c953d4 100644
--- a/docs/Dependencies.txt
+++ b/docs/Dependencies.txt
@@ -1,56 +1,57 @@
 
 SIP SIMPLE client SDK dependencies
 ----------------------------------
 
 Home page: http://sipsimpleclient.org
 
 
 Packages available from AG Projects:
 
  * python3-application      http://pypi.python.org/simple/python-application
  * python3-eventlib         http://download.ag-projects.com/SipSimpleSDK/Python3/ 
  * python3-gnutls           http://download.ag-projects.com/SipSimpleSDK/Python3/
  * python3-otr              http://download.ag-projects.com/SipSimpleSDK/Python3/
  * python3-msrplib          http://download.ag-projects.com/SipSimpleSDK/Python3/
  * python3-xcaplib          http://download.ag-projects.com/SipSimpleSDK/Python3/
 
 
 Packages available within the OS distribution:
  
- * python                   http://python.org >= 3.6.5
+ * python3                  http://python.org >= 3.6.5
  * python3-lxml             http://pypi.org/project/lxml/
  * python3-greenlet         http://pypi.python.org/pypi/greenlet 
  * cython                   http://www.cython.org
  * dnspython                http://www.dnspython.org
  * twisted                  http://twistedmatrix.com
- * zope-interface           http://www.zope.org      
+ * zope-interface           http://www.zope.org
+ * openssl
 
 
 Other libraries (C):
 
  * ffmpeg (libavformat, libswscale, libavcodec, libavutil)
- * libx264 (recent snapshot)
- * libvpx (>= 1.3.0)
+ * libx264
+ * libvpx
  * libasound2
  * libuuid
  * libsqlite3
  * pkg-config
- * openssl
+
 
 To compile the video dependencies (ffmpeg / libx264 / libvpx):
 
 export SIPSIMPLE_FFMPEG_PATH=$HOME/work/ag-projects/video/local
 
 NOTE: yasm is required in order to enable asm optimizations. It does not
 come preinstalled on OSX, so it has to be manually installed. (brew install
 yasm will do)
 
 NOTE: libx264 and libvpx can be installed also using Homebrew on OSX.
 
 
 For ffmpeg:
 
 ./configure --enable-shared --disable-static --enable-memalign-hack --enable-gpl --enable-libx264 --disable-avdevice --disable-swresample --disable-postproc --prefix=$SIPSIMPLE_FFMPEG_PATH
 make
 make install
 
diff --git a/docs/Install.linux b/docs/Install.linux
index c70f81de..f0a25b3d 100644
--- a/docs/Install.linux
+++ b/docs/Install.linux
@@ -1,99 +1,98 @@
 
 SIP SIMPLE SDK installation on Linux
 ------------------------------------
 
 Home page: http://sipsimpleclient.org
 
 
 This document described the installation procedure on 
 Linux operating systems.
 
 
 Step 1. Prerequisites
 ---------------------
 
-Both i386 or amd64 architectures are supported. Install the C compiling
-environment, Python 3 and the development version for the following
-packages:
+Install the C compiling environment, Python 3 and the development version
+for the following packages:
 
  * openssl
  * ffmpeg
 
 
 Step 2. Install system dependencies
 -----------------------------------
 
 See Dependencies.txt for detailed description of the required libraries and
 their minimum version number.
 
 Use the appropriate package manager for your Linux distribution to install
 the following packages, notice the minimum version numbers.
 
 You can use the easy_install script provided by the python-setuptools
 package to install the packages:
 
 sudo pip3 install -U cython dnspython lxml twisted python-dateutil \
 greenlet zope.interface
 
 
 Step 3. Install AG Projects dependencies
 ----------------------------------------
 
  - python3-application
  - python3-eventlib
  - python3-gnutls
  - python3-otr
  - python3-msrplib
  - python3-xcaplib
 
 
 For each of them, in the exact order as listed above, retrieve the packages
 as follows:
 
 
 Using darcs:
 
 darcs clone http://devel.ag-projects.com/repositories/PROJECT
 
 replace PROJECT with each of the names above
 
 As tar archives from:
 
 http://download.ag-projects.com/SipSimpleSDK/Python3/
 
 Install these packages by going into each directory.
 
-Using pip inside your virtual environment:
+Using pip3 inside your user environment:
 
 pip3 install --user .
 
 System-wide using setup.py:
 
 sudo python3 setup.py install
 
 As a debian package:
 
 ./makedeb.sh
 
 The debian package can be found inside ./dist folder
 
 sudo dpkg -i *.deb
 
 
 Step 4. Install the SDK
 -----------------------
 
 The SDK consists of two packages:
 
  - python3-sipsimple
- - sipclients3
+ - sipclients3 (for testing all SDK functions)
 
 Install them similar to the dependencies above.
 
 
 Step 5. Testing the SDK
 -----------------------
 
 Use the command line tools provided by sipclients3 package, the binaries
 start with sip- prefix
 
diff --git a/docs/Install.osx b/docs/Install.osx
index 621354d2..f0d59003 100644
--- a/docs/Install.osx
+++ b/docs/Install.osx
@@ -1,39 +1,42 @@
 
 Installation procedure for SIP SIMPLE SDK on MacOSX
 ---------------------------------------------------
 
 Home page: http://sipsimpleclient.org
 
 This document describes the installation procedure on MacOSX >= 10.14
 
 The installation procedure consists of the steps described below:
 
 Step 1. Prerequisites
 Step 2. Install dependencies
 Step 3. Install SIP SIMPLE SDK
 
 
 Step 1. Prerequisites
 ---------------------
 
  * MacOSX >= 10.14
  * Apple Developer tools (XCode 11)
  * Homebrew from http://brew.sh
 
 
 Step 2. Install dependencies
 ----------------------------
 
 See Dependencies.txt for detailed description of the required libraries and
 their minimum version number.
 
 A. Install the C dependencies, the software will be installed
 under /usr/local folder by default with Homebrew:
 
-brew install darcs gnutls yasm pkg-config x264 libvpx mpfr libmpc python3
+brew install darcs gnutls yasm pkg-config x264 libvpx mpfr libmpc
 
 brew install -s ffmpeg
 
+
 Step 3. Install SIP SIMPLE SDK 
+------------------------------
 
 See Install.linux document
+