diff --git a/README.md b/README.md
index b2ff396ea5..4ffb7c745d 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ unnecessary object creation, and so forth. It supports Java, JavaScript, Salesfo
 XML, XSL.
 
 Additionally it includes **CPD**, the copy-paste-detector. CPD finds duplicated code in
-C/C++, C#, Dart, Fortran, Go, Groovy, Java, JavaScript, JSP, Kotlin, Matlab,
+C/C++, C#, Dart, Fortran, Go, Groovy, Java, JavaScript, JSP, Kotlin, Lua, Matlab,
 Objective-C, Perl, PHP, PLSQL, Python, Ruby, Salesforce.com Apex, Scala, Swift and Visualforce.
 
 ## Source and Documentation
diff --git a/docs/pages/pmd/userdocs/cpd.md b/docs/pages/pmd/userdocs/cpd.md
index fbc1b267f7..1afc993ae1 100644
--- a/docs/pages/pmd/userdocs/cpd.md
+++ b/docs/pages/pmd/userdocs/cpd.md
@@ -218,6 +218,7 @@ This behavior has been introduced to ease CPD integration into scripts or hooks,
 * Java
 * Jsp
 * Kotlin
+* Lua
 * Matlab
 * Objective-C
 * Perl
@@ -366,7 +367,7 @@ Here's a screenshot of CPD after running on the JDK 8 java.lang package:
 ## Suppression
 
 Arbitrary blocks of code can be ignored through comments on **Java**, **C/C++**, **Dart**, **Go**, **Javascript**,
-**Kotlin**, **Matlab**, **Objective-C**, **PL/SQL**, **Python** and **Swift** by including the keywords `CPD-OFF` and `CPD-ON`.
+**Kotlin**, **Lua**, **Matlab**, **Objective-C**, **PL/SQL**, **Python** and **Swift** by including the keywords `CPD-OFF` and `CPD-ON`.
 
 ```java
     public Object someParameterizedFactoryMethod(int x) throws Exception {