diff --git a/js/misc/dbusUtils.js b/js/misc/dbusUtils.js
index 2813de2a7..6e15f9e14 100644
--- a/js/misc/dbusUtils.js
+++ b/js/misc/dbusUtils.js
@@ -62,6 +62,6 @@ export function loadSubInterfaceXML(iface, ifaceFile) {
 
     return (
         xmlHeader +
-        xml.substr(ifaceStartIndex, ifaceEndIndex - ifaceStartIndex) +
+        xml.substring(ifaceStartIndex, ifaceEndIndex) +
         xmlFooter);
 }
diff --git a/js/ui/calendar.js b/js/ui/calendar.js
index fa683de0c..43079ed6d 100644
--- a/js/ui/calendar.js
+++ b/js/ui/calendar.js
@@ -319,7 +319,7 @@ class DBusEventSource extends EventSourceBase {
             let event = new CalendarEvent(id, date, end, summary);
             /* It's a recurring event */
             if (!id.endsWith('\n')) {
-                const parentId = id.substr(0, id.lastIndexOf('\n') + 1);
+                const parentId = id.substring(0, id.lastIndexOf('\n') + 1);
                 if (!handledRemovals.has(parentId)) {
                     handledRemovals.add(parentId);
                     this._removeMatching(parentId);
diff --git a/js/ui/messageList.js b/js/ui/messageList.js
index acc503319..dda9f22a9 100644
--- a/js/ui/messageList.js
+++ b/js/ui/messageList.js
@@ -57,7 +57,7 @@ class URLHighlighter extends St.Label {
         this.connect('style-changed', () => {
             let [hasColor, color] = this.get_theme_node().lookup_color('link-color', false);
             if (hasColor) {
-                let linkColor = color.to_string().substr(0, 7);
+                let linkColor = color.to_string().substring(0, 7);
                 if (linkColor !== this._linkColor) {
                     this._linkColor = linkColor;
                     this._highlightUrls();
@@ -143,11 +143,11 @@ class URLHighlighter extends St.Label {
         let pos = 0;
         for (let i = 0; i < urls.length; i++) {
             let url = urls[i];
-            let str = this._text.substr(pos, url.pos - pos);
+            let str = this._text.substring(pos, url.pos);
             markup += `${str}<span foreground="${this._linkColor}"><u>${url.url}</u></span>`;
             pos = url.pos + url.url.length;
         }
-        markup += this._text.substr(pos);
+        markup += this._text.substring(pos);
         this.clutter_text.set_markup(markup);
     }
 
diff --git a/js/ui/runDialog.js b/js/ui/runDialog.js
index 667608796..29a015b16 100644
--- a/js/ui/runDialog.js
+++ b/js/ui/runDialog.js
@@ -107,7 +107,7 @@ class RunDialog extends ModalDialog.ModalDialog {
                 if (text.lastIndexOf(' ') === -1)
                     prefix = text;
                 else
-                    prefix = text.substr(text.lastIndexOf(' ') + 1);
+                    prefix = text.substring(text.lastIndexOf(' ') + 1);
                 let postfix = this._getCompletion(prefix);
                 if (postfix != null && postfix.length > 0) {
                     o.insert_text(postfix, -1);
@@ -143,7 +143,7 @@ class RunDialog extends ModalDialog.ModalDialog {
             }
             if (k === 0)
                 return '';
-            return s1.substr(0, k);
+            return s1.substring(0, k);
         }
 
         let paths = GLib.getenv('PATH').split(':');
@@ -172,7 +172,7 @@ class RunDialog extends ModalDialog.ModalDialog {
             return null;
 
         let common = results.reduce(_getCommon, null);
-        return common.substr(text.length);
+        return common.substring(text.length);
     }
 
     _getCompletion(text) {