diff --git a/chrome/content/zotero/bindings/itembox.xml b/chrome/content/zotero/bindings/itembox.xml
index 2e1aa5e86..86e1f6c70 100644
--- a/chrome/content/zotero/bindings/itembox.xml
+++ b/chrome/content/zotero/bindings/itembox.xml
@@ -427,7 +427,7 @@
 							// Pull out DOI, in case there's a prefix
 							var doi = Zotero.Utilities.cleanDOI(val);
 							if (doi) {
-								doi = "http://dx.doi.org/" + encodeURIComponent(doi);
+								doi = "https://doi.org/" + encodeURIComponent(doi);
 								label.classList.add("pointer");
 								label.setAttribute("onclick", "ZoteroPane_Local.loadURI('" + doi + "', event)");
 								label.setAttribute("tooltiptext", Zotero.getString('locate.online.tooltip'));
diff --git a/chrome/content/zotero/xpcom/utilities.js b/chrome/content/zotero/xpcom/utilities.js
index 09977a759..d80445f34 100644
--- a/chrome/content/zotero/xpcom/utilities.js
+++ b/chrome/content/zotero/xpcom/utilities.js
@@ -311,7 +311,7 @@ Zotero.Utilities = {
 			throw "cleanDOI: argument must be a string";
 		}
 
-		var doi = x.match(/10\.[0-9]{4,}\/[^\s]*[^\s\.,]/);
+		var doi = x.match(/10(?:\.[0-9]{4,})?\/[^\s]*[^\s\.,]/);
 		return doi ? doi[0] : null;
 	},