diff --git a/queries/php/highlights.scm b/queries/php/highlights.scm
index 444cc417c..44dfe2c55 100644
--- a/queries/php/highlights.scm
+++ b/queries/php/highlights.scm
@@ -163,6 +163,7 @@
  "private"
  "protected"
  "public"
+ "readonly"
  "static"
  "trait"
  "unset"