diff --git a/README.txt b/README.txt
index f953392..a09285f 100644
--- a/README.txt
+++ b/README.txt
@@ -4,9 +4,9 @@ Tags: woocommerce, discount, email, shipping, coupon
 Requires at least: 5.8
 Tested up to: 7.1.2
 Requires PHP: 7.4
-Stable tag: 1.6.2
+Stable tag: 1.6.3
 WC requires at least: 6.0
-WC tested up to: 11.1.0
+WC tested up to: 11.1.2
 License: GPLv2 or later
 License URI: https://www.gnu.org/licenses/gpl-2.0.html
 
@@ -96,6 +96,9 @@ The most specific match wins: exact email, then domain, then partial match.
 
 == Changelog ==
 
+= 1.6.3 =
+* The WooCommerce version this plugin declares as tested is now the same in both places it is written. The readme still said 11.1.0 while the plugin itself said 11.1.2.
+
 = 1.6.2 =
 * Declares compatibility with WordPress 7.1.2 and WooCommerce 11.1.2, both tested. No functional change.
 
diff --git a/ci/selftest.sh b/ci/selftest.sh
index 03762a5..26abc72 100755
--- a/ci/selftest.sh
+++ b/ci/selftest.sh
@@ -329,6 +329,47 @@ else
   ok "no fixture executed: the clone still has no local identity"
 fi
 
+# ------------------------------------------------------ compat values in two files
+# 🔴 The two currency checks read each value from the file that value belongs
+# in — correct, and therefore blind to a SECOND copy in the other file. The
+# plugin header said WC 11.1.2 and README.txt said 11.1.0 for four releases
+# with that step printing green. Each reading was right; the pair was never
+# compared. So these rows are about our own two copies agreeing, which is a
+# fact about this tree and fatal, not about being up to date, which is advisory.
+echo
+echo "→ a compatibility value in two files must agree"
+cd "$work/repo"
+cp README.txt "$work/README.orig"
+compat_row() { # $1 = field, $2 = value to plant in the readme
+  cp "$work/README.orig" README.txt
+  sed -i "s/^$1: .*/$1: $2/" README.txt
+  if [ "$(grep -c "^$1: $2\$" README.txt)" -lt 1 ]; then
+    bad "could not stage the compat fixture for '$1'"
+    return
+  fi
+  compat_out=$(./ci/static.sh 2>&1 || true)
+  if printf '%s' "$compat_out" | grep -q "'$1' is .* in the plugin header and"; then
+    ok "flagged a drifted '$1' ($2 in the readme)"
+  else
+    bad "NOT FLAGGED: '$1' drifted to $2 in the readme and nothing compared the two copies"
+  fi
+}
+compat_row 'WC tested up to'   '11.0.0'
+compat_row 'Requires PHP'      '8.0'
+compat_row 'Requires at least' '5.0'
+cp "$work/README.orig" README.txt
+
+# The pass must say how many pairs it compared. A tree where the readme carries
+# none of these fields has nothing to disagree and prints the same silence as
+# one where every pair matches.
+compat_clean=$(./ci/static.sh 2>&1 || true)
+pairs=$(printf '%s' "$compat_clean" | grep -c "^  both files say ")
+if [ "$pairs" -ge 3 ]; then
+  ok "$pairs value pairs compared across the two files"
+else
+  bad "only $pairs pairs compared — the agreement check has almost nothing to look at"
+fi
+
 # ------------------------------------------------------------------- plugin.conf
 echo
 echo "→ the floors must be required, not defaulted"
diff --git a/ci/static.sh b/ci/static.sh
index c63514f..48b4242 100755
--- a/ci/static.sh
+++ b/ci/static.sh
@@ -476,6 +476,31 @@ behind() { # claimed current -> true when claimed is the older of the two
 # reads that one from the plugin header and nowhere else.
 
 
+# 🔴 A value in two files drifts, and reading each one from its authoritative
+# file is a correct answer to a different question. The two checks below ask
+# "is this value current", one per value, each in the file that value belongs
+# in — so a SECOND copy of the same value in the other file is never compared
+# with anything. Measured 2026-09-28: the plugin header said WC 11.1.2 and
+# README.txt said 11.1.0, four releases after the bump, with this step green
+# and printing "plugin header says 11.1.2, current release is 11.1.2" — true,
+# complete, and about the copy that was already right.
+#
+# So: any field carried by BOTH files must agree. Not "is it current" (that is
+# advisory below, and rightly), but "do our own two copies say the same thing",
+# which is a fact about this tree and therefore fatal.
+for field in 'Tested up to' 'WC tested up to' 'Requires at least' 'Requires PHP'; do
+  h=$(ci_plugin_header "$field")
+  r=
+  [ -n "$readme" ] && r=$(sed -n -E "s/^$field:[[:space:]]*([^[:space:]]+).*/\1/p" "$readme" | head -1)
+  if [ -n "$h" ] && [ -n "$r" ]; then
+    if [ "$h" = "$r" ]; then
+      echo "  both files say '$field: $h'"
+    else
+      note_fail "'$field' is '$h' in the plugin header and '$r' in $readme. One of them is stale and nothing else compares them."
+    fi
+  fi
+done
+
 tested_wp=
 [ -n "$readme" ] && tested_wp=$(sed -n -E 's/^Tested up to:[[:space:]]*([^[:space:]]+).*/\1/p' "$readme" | head -1)
 echo "  WordPress:   ${readme:-readme} says ${tested_wp:-<missing>}, current release is ${current_wp:-<unknown>}"
diff --git a/woocommerce-email-discount-manager.php b/woocommerce-email-discount-manager.php
index a867f79..a532c6a 100644
--- a/woocommerce-email-discount-manager.php
+++ b/woocommerce-email-discount-manager.php
@@ -4,7 +4,7 @@
  * Plugin URI:  https://gitea.nolimit.dk/kw/woo-discount-manager
  * Update URI:  https://gitea.nolimit.dk/kw/nolimit-discounts-dist
  * Description: Apply discounts and show/hide shipping methods based on the customer's email address (full address, domain or partial match).
- * Version:     1.6.2
+ * Version:     1.6.3
  * Author:      Kristian Wind
  * Author URI:  https://gitea.nolimit.dk/kw
  * License:     GPL-2.0-or-later
@@ -28,7 +28,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
 
-define( 'WC_EDM_VERSION', '1.6.2' );
+define( 'WC_EDM_VERSION', '1.6.3' );
 define( 'WC_EDM_PLUGIN_FILE', __FILE__ );
 define( 'WC_EDM_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
 define( 'WC_EDM_PLUGIN_URL', plugin_dir_url( __FILE__ ) );