diff --git a/README.md b/README.md
index 7f59afa..44e060a 100644
--- a/README.md
+++ b/README.md
@@ -3,11 +3,7 @@ A scanner util for [NetBox](https://netbox.readthedocs.io/en/stable/), because c
 
 
 ## Installation
-`netbox-scanner` is available as a Python package via [PyPi](https://pypi.org/project/netbox-scanner/), so you can install it using `pip`:
-
-    $ pip3 install netbox-scanner
-
-You can also download from GitHub:
+`netbox-scanner` is compatible with Python 3.6+, and can be installed like this:
 
     $ wget https://github.com/forkd/netbox-scanner/archive/master.zip
     $ unzip netbox-scanner-master.zip -d netbox-scanner
@@ -15,7 +11,7 @@ You can also download from GitHub:
     $ pip install -r requirements.txt
     $ python netbox-scanner/nbscanner
 
-Note that `netbox-scanner` will require [Nmap](https://nmap.org/) and an instance of NetBox ready to use.
+Note that `netbox-scanner` will require [Nmap](https://nmap.org/) and an instance of NetBox (tested under NetBox 2.4.4) ready to use.
 
 
 ## Scanning the Network
diff --git a/requirements.txt b/requirements.txt
index 66d389e..713b13f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,18 +1,17 @@
-asn1crypto==0.24.0
-bcrypt==3.1.4
-certifi==2018.8.24
-cffi==1.11.5
-chardet==3.0.4
-cpe==1.2.1
-cryptography==2.3.1
-idna==2.7
-netaddr==0.7.19
-paramiko==2.4.2
-pyasn1==0.4.4
-pycparser==2.19
-PyNaCl==1.3.0
-pynetbox==3.4.6
-python-nmap==0.6.1
-requests==2.19.1
-six==1.11.0
-urllib3==1.23
+asn1crypto==0.24.0
+bcrypt==3.1.6
+certifi==2019.3.9
+cffi==1.12.2
+chardet==3.0.4
+cpe==1.2.1
+cryptography==2.6.1
+idna==2.8
+paramiko==2.4.2
+pyasn1==0.4.5
+pycparser==2.19
+PyNaCl==1.3.0
+pynetbox==4.0.6
+python-nmap==0.6.1
+requests==2.21.0
+six==1.12.0
+urllib3==1.24.1