diff --git a/docs/source/installation.rst b/docs/source/installation.rst
index 870107b..f93e143 100644
--- a/docs/source/installation.rst
+++ b/docs/source/installation.rst
@@ -21,7 +21,7 @@ Android on Ubuntu 18.04 (64bit)
 ::
 
     sudo apt update
-    sudo apt install -y git zip unzip openjdk-8-jdk python3-pip autoconf libtool pkg-config zlib1g-dev libncurses5-dev libncursesw5-dev libtinfo5 cmake libffi-dev
+    sudo apt install -y git zip unzip openjdk-8-jdk python3-pip autoconf libtool pkg-config zlib1g-dev libncurses5-dev libncursesw5-dev libtinfo5 cmake libffi-dev libssl-dev
     pip3 install --user --upgrade cython virtualenv  # the --user should be removed if you do this in a venv
 
     # add the following line at the end of your ~/.bashrc file