diff --git a/utilities.js b/utilities.js
index 761e0d3..4e715a7 100644
--- a/utilities.js
+++ b/utilities.js
@@ -430,13 +430,12 @@ var Utilities = {
 
 		// Next try arXiv
 		if (!identifiers.length) {
-			// arXiv identifiers are extracted without version number
-			// i.e. 0706.0044v1 is extracted as 0706.0044,
-			// because arXiv OAI API doesn't allow to access individual versions
-			let arXiv_RE = /((?:[^A-Za-z]|^)([\-A-Za-z\.]+\/\d{7})(?:(v[0-9]+)|)(?!\d))|((?:\D|^)(\d{4}\.\d{4,5})(?:(v[0-9]+)|)(?!\d))/g;
+			// arXiv identifiers are extracted with and without version number
+			// i.e. 0706.0044v1 is extracted as [0706.0044v1, 0706.0044, 1]
+			let arXiv_RE = /\b(([-A-Za-z.]+\/\d{7}|\d{4}\.\d{4,5})(?:v(\d+))?)(?!\d)/g; // 1: full ID, 2: ID without version, 3: version #
 			let m;
 			while ((m = arXiv_RE.exec(text))) {
-				let arXiv = m[2] || m[5];
+				let arXiv = m[1];
 				if (arXiv && !foundIDs.has(arXiv)) {
 					identifiers.push({arXiv: arXiv});
 					foundIDs.add(arXiv);