diff --git a/metadata.json b/metadata.json
index 149a1e5..b427d57 100644
--- a/metadata.json
+++ b/metadata.json
@@ -3,8 +3,7 @@
     "description" : "Bringing back vertically stacked workspaces",
     "original-author": "rens.althuis@gmail.com",
     "shell-version" : [
-        "40",
-        "41"
+        "42"
     ],
     "url" : "",
     "uuid" : "vertical-overview@RensAlthuis.github.com",
diff --git a/overviewControls.js b/overviewControls.js
index 6b6f6f9..77a2a67 100644
--- a/overviewControls.js
+++ b/overviewControls.js
@@ -120,8 +120,9 @@ function exitOverviewAnimation() {
 }
 
 var ControlsManagerLayoutOverride = {
-    _computeWorkspacesBoxForState: function (state, box, startY, searchHeight, leftOffset, rightOffset) {
-        const workspaceBox = box.copy();
+    _computeWorkspacesBoxForState(state, workAreaBox, searchHeight, dashHeight, thumbnailsHeight) {
+        const workspaceBox = workAreaBox.copy();
+        const [startX, startY] = workAreaBox.get_origin();
         const [width, height] = workspaceBox.get_size();
         const { spacing } = this;
         const { expandFraction } = this._workspacesThumbnails;
@@ -141,10 +142,10 @@ var ControlsManagerLayoutOverride = {
         case ControlsState.WINDOW_PICKER:
         case ControlsState.APP_GRID:
             workspaceBox.set_origin(
-                leftOffset + spacing,
+                this.leftOffset + spacing,
                 startY + searchHeight + spacing * expandFraction);
             workspaceBox.set_size(
-                width - leftOffset - rightOffset - (spacing * 2),
+                width - this.leftOffset - this.rightOffset - (spacing * 2),
                 height - startY - (searchHeight + spacing * expandFraction) * 2);
             break;
         }
@@ -152,18 +153,19 @@ var ControlsManagerLayoutOverride = {
         return workspaceBox;
     },
 
-    _getAppDisplayBoxForState: function(state, box, startY, searchHeight) {
-        const [width, height] = box.get_size();
+    _getAppDisplayBoxForState(state, workAreaBox, searchHeight, dashHeight, appGridBox) {
+        const [startX, startY] = workAreaBox.get_origin();
+        const [width, height] = workAreaBox.get_size();
         const appDisplayBox = new Clutter.ActorBox();
         const { spacing } = this;
 
         switch (state) {
         case ControlsState.HIDDEN:
         case ControlsState.WINDOW_PICKER:
-            appDisplayBox.set_origin(0, box.y2);
+            appDisplayBox.set_origin(startX, workAreaBox.y2);
             break;
         case ControlsState.APP_GRID:
-            appDisplayBox.set_origin(0,
+            appDisplayBox.set_origin(startX,
                 startY + searchHeight + spacing);
             break;
         }
diff --git a/util.js b/util.js
index 1eb42dd..5def5ea 100644
--- a/util.js
+++ b/util.js
@@ -14,7 +14,7 @@ function overrideProto(proto, overrides) {
 
     for (var symbol in overrides) {
         if (symbol.startsWith('after_')) {
-            const actualSymbol = symbol.substr('after_'.length);
+            const actualSymbol = symbol.slice('after_'.length);
             const fn = proto[actualSymbol];
             const afterFn = overrides[symbol]
             proto[actualSymbol] = function() {
@@ -28,7 +28,7 @@ function overrideProto(proto, overrides) {
         else {
             backup[symbol] = proto[symbol];
             if (symbol.startsWith('vfunc')) {
-                hookVfunc(proto, symbol.substr(6), overrides[symbol]);
+                hookVfunc(proto[Gi.gobject_prototype_symbol], symbol.slice(6), overrides[symbol]);
             }
             else {
                 proto[symbol] = overrides[symbol];
diff --git a/workspacesView.js b/workspacesView.js
index c8813ee..5b60d99 100644
--- a/workspacesView.js
+++ b/workspacesView.js
@@ -15,7 +15,9 @@ const Util = Self.imports.util;
 
 function override() {
     global.vertical_overview.GSFunctions['WorkspacesView'] = Util.overrideProto(WorkspacesView.WorkspacesView.prototype, WorkspacesViewOverride);
-    log('You may see an error below,\nSecondaryMonitorDisplay is defined as const for some reason.\nSince I\'m overriding values in that const an error show might show up.\n Feel free to ignore it');
+    log('You may see an error below,\nSecondaryMonitorDisplay is defined as const for some reason\nSince I\'m overriding values in that const an error show might show up.\n Feel free to ignore it');
+    SecondaryMonitorDisplay = WorkspacesView.SecondaryMonitorDisplay;
+
     global.vertical_overview.GSFunctions['SecondaryMonitorDisplay'] = Util.overrideProto(WorkspacesView.SecondaryMonitorDisplay.prototype, SecondaryMonitorDisplayOverride);
     log('Thank you, please carry on');