diff --git a/README.md b/README.md
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+++ b/README.md
@@ -302,6 +302,7 @@ See also [awesome-industrial-control-system-security](https://github.com/hslatma
 
 * [Industrial Exploitation Framework (ISF)](https://github.com/dark-lbp/isf) - Metasploit-like exploit framework based on routersploit designed to target Industrial Control Systems (ICS), SCADA devices, PLC firmware, and more.
 * [s7scan](https://github.com/klsecservices/s7scan) - Scanner for enumerating Siemens S7 PLCs on a TCP/IP or LLC network.
+* [OpalOPC](https://opalopc.com/) - Commercial OPC UA vulnerability assessment tool, sold by Molemmat.
 
 ## Intentionally Vulnerable Systems