diff --git a/README.md b/README.md
index 0e393c5547d05073f5adb4ef9b1f03dd7522f539..618d1d2bee0045accf6193d7c9a9a761c4872666 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ This role provides all necessary tasks to initialise RHEL 7 servers for SLUBArch
 
 To use this role, the following software must be installed on your workstation:
 * ansible
+* jmespath
 
 To deploy this role to a managed host, the following software must be installed on the target:
 * Python3
@@ -58,6 +59,11 @@ For more help with ansible-playbook, use the `--help` flag.
 
 Tests have been prepared/implemented using the Molecule framework. The details on using the test suite are described below `molecule/`.
 
+Install the `vagrant-disksize` plugin before running the Molecule testsuite!
+```
+vagrant plugin install vagrant-disksize
+```
+
 ## Variables
 
 Many variables have been "hidden" in encrypted Ansible Vaults. For security reasons, these Vaults are maintained in a separate private internal repository of SLUB's Git. However, in order to better understand the data within the vaults, you can find `\*.vault.example` files below the `vars/` directory.