diff --git a/installer/README.md b/installer/README.md
index 80e31802e..aac63f6db 100644
--- a/installer/README.md
+++ b/installer/README.md
@@ -11,16 +11,24 @@ The SODA Delfin supports two types of installation
 
 ### Install steps
 
+Ensure no ansible & docker installed, OR Lastest ansible and docker tools are installed with versions listed below or later. If ansible & docker is not installed in the OS, script `install_dependencies.sh` will install it.
+
 ```bash
-sudo apt-get update && sudo apt-get install -y git make curl wget libltdl7 libseccomp2 libffi-dev gawk
+sudo apt-get update && sudo apt-get install -y git
 git clone https://github.com/sodafoundation/delfin.git
-# git checkout <delfin-release-version>
+# git checkout <delfin-release-version v1.6.1+>
 cd delfin/installer
-chmod +x install_dependencies.sh && ./install_dependencies.sh
+chmod +x install_dependencies.sh && source install_dependencies.sh
 cd ansible
 export PATH=$PATH:/home/$USER/.local/bin
 sudo -E env "PATH=$PATH" ansible-playbook site.yml -i local.hosts -v
 ```
+
+**NOTE:** *Tools version used for verification of Delfin under Ubuntu 20.04*
+* ansible version: 5.10.0
+* docker version: 20.10.21
+* docker compose version: 2.12.2
+
 ### Uninstall
 ```bash
 sudo -E env "PATH=$PATH" ansible-playbook clean.yml -i local.hosts -v
diff --git a/installer/install_dependencies.sh b/installer/install_dependencies.sh
old mode 100644
new mode 100755
index f2f26abb1..d225632b3
--- a/installer/install_dependencies.sh
+++ b/installer/install_dependencies.sh
@@ -14,13 +14,13 @@ sudo apt-get update
 
 # Install dependencies
 echo Installing dependencies
-sudo apt-get install -y apt-transport-https ca-certificates curl gnupg gnupg-agent lsb-release software-properties-common sshpass pv gawk
+sudo apt-get install -y make curl wget libltdl7 libseccomp2 libffi-dev gawk apt-transport-https ca-certificates curl gnupg gnupg-agent lsb-release software-properties-common sshpass pv
 
 # Install python dependencies
 echo Installing Python dependencies
 sudo apt-get install -y python3-distutils
 sudo apt-get install -y python3-pip
-sudo python3 -m pip install -U pip setuptools
+python3 -m pip install -U pip setuptools
 
 # Install ansible if not present
 if [ "`which ansible`" != ""  ]; then