diff --git a/README.md b/README.md
index cfc33a41..7c5a6307 100644
--- a/README.md
+++ b/README.md
@@ -135,7 +135,8 @@ Each PowerShell script should follow the 7 golden rules:
 * **Rule #4:** provide a metadata header with syntax, description, author, source, and license
 * **Rule #5:** prefer command-line options, else ask the user
 * **Rule #6:** the encoding of the script is in UTF-8 with BOM to support Unicode characters
-* **Rule #7:** exits 0 for success, else print an error message and exit with the error code (mostly 1)
+* **Rule #7:** use 'Set-StrictMode -Version Latest' to enable additional error checking
+* **Rule #8:** exits 0 for success, else print an error message and exit with the error code (mostly 1)
 
 Feedback
 --------
diff --git a/Scripts/train-dns-cache.ps1 b/Scripts/train-dns-cache.ps1
index 2ef1b584..210af3b2 100755
--- a/Scripts/train-dns-cache.ps1
+++ b/Scripts/train-dns-cache.ps1
@@ -5,6 +5,8 @@
 # Author:	Markus Fleschutz
 # Source:	github.com/fleschutz/PowerShell
 # License:	CC0
+
+Set-StrictMode -Version Latest
  
 try {
 	$StartTime = Get-Date
diff --git a/Scripts/write-big.ps1 b/Scripts/write-big.ps1
index 68c0e5eb..fec7ef0f 100755
--- a/Scripts/write-big.ps1
+++ b/Scripts/write-big.ps1
@@ -8,6 +8,8 @@
 
 param([String]$Text)
 
+Set-StrictMode -Version Latest
+
 function BigA() { param([Int]$Row)
 	switch($Row) {
 	1 { return "   __   " }