diff --git a/lib/validator.js b/lib/validator.js
index 798d3e0..c8700aa 100644
--- a/lib/validator.js
+++ b/lib/validator.js
@@ -381,24 +381,26 @@ class Validator {
     let id = "datePublishedFormat"
     let clause = `datePublished: MUST be a string in [ISO 8601 date format][DateTime] and SHOULD be specified to at least the precision of a day, MAY be a timestamp down to the millisecond.`
     if (root?.datePublished) {
-      if (!root.datePublished[0].match(/^\d{4}-?([0]\d|1[0-2])?-?([0-2]\d|3[01])?/)) {
-        this.log(
-          {
-            id,
-            status: "error",
-            message: `datePublished does not start with a compliant date in this format:  YYYY, YYYY-MM or YYYY-MM-DD`,
-            clause
-          }
-        );
-      } else {
-        this.log(
-          {
-            id,
-            status: "success",
-            message: "datePublished is in compliant format.",
-            clause
-          }
-        );
+      for(let dP of root.datePublished) {
+        if (dP && !dP.match(/^\d{4}-?([0]\d|1[0-2])?-?([0-2]\d|3[01])?/)) {
+          this.log(
+            {
+              id,
+              status: "error",
+              message: `datePublished does not start with a compliant date in this format:  YYYY, YYYY-MM or YYYY-MM-DD`,
+              clause
+            }
+          );
+        } else {
+          this.log(
+            {
+              id,
+              status: "success",
+              message: "datePublished is in compliant format.",
+              clause
+            }
+          );
+        }
       }
     }
   }
diff --git a/package-lock.json b/package-lock.json
index 73b2402..595b5ad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ro-crate",
-  "version": "3.4.0",
+  "version": "3.4.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "ro-crate",
-      "version": "3.4.0",
+      "version": "3.4.2",
       "license": "GPL-3.0-or-later",
       "dependencies": {
         "commander": "^12.0.0",
diff --git a/package.json b/package.json
index 3682557..0b19871 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ro-crate",
-  "version": "3.4.1",
+  "version": "3.4.2",
   "description": "Research Object Crate (RO-Crate) utilities for making and consuming crates",
   "main": "index.js",
   "scripts": {