diff --git a/lib/extension/window.js b/lib/extension/window.js
index b02d8d5..24356f5 100644
--- a/lib/extension/window.js
+++ b/lib/extension/window.js
@@ -951,9 +951,16 @@ export class WindowManager extends GObject.Object {
   move(metaWindow, rect) {
     if (!metaWindow) return;
     if (metaWindow.grabbed) return;
-    metaWindow.unmaximize(Meta.MaximizeFlags.HORIZONTAL);
-    metaWindow.unmaximize(Meta.MaximizeFlags.VERTICAL);
-    metaWindow.unmaximize(Meta.MaximizeFlags.BOTH);
+    try {
+      // GNOME 49+
+      metaWindow.set_unmaximize_flags(Meta.MaximizeFlags.BOTH);
+      metaWindow.unmaximize();
+    } catch (e) {
+      // pre-49 fallback
+      metaWindow.unmaximize(Meta.MaximizeFlags.HORIZONTAL);
+      metaWindow.unmaximize(Meta.MaximizeFlags.VERTICAL);
+      metaWindow.unmaximize(Meta.MaximizeFlags.BOTH);
+    }
 
     let windowActor = metaWindow.get_compositor_private();
     if (!windowActor) return;
@@ -1235,7 +1242,13 @@ export class WindowManager extends GObject.Object {
     let tilingModeEnabled = this.ext.settings.get_boolean("tiling-mode-enabled");
     let gap = this.calculateGaps(nodeWindow);
     let maximized = () => {
-      return metaWindow.get_maximized() === 3 || metaWindow.is_fullscreen() || gap === 0;
+      try {
+        // GNOME 49+
+        return metaWindow.is_maximized() || metaWindow.is_fullscreen() || gap === 0;
+      } catch (e) {
+        // pre-49 fallback
+        return metaWindow.get_maximized() === 3 || metaWindow.is_fullscreen() || gap === 0;
+      }
     };
     let monitorCount = global.display.get_n_monitors();
     let tiledChildren = this.tree.getTiledChildren(nodeWindow.parentNode.childNodes);
@@ -1287,7 +1300,18 @@ export class WindowManager extends GObject.Object {
       }
     }
 
-    if (gap === 0 || metaWindow.get_maximized() === 1 || metaWindow.get_maximized() === 2) {
+    if (
+      gap === 0 ||
+      (() => {
+        try {
+          // GNOME 49+
+          return metaWindow.is_maximized();
+        } catch (e) {
+          // pre-49 fallback
+          return metaWindow.get_maximized() === 1 || metaWindow.get_maximized() === 2;
+        }
+      })()
+    ) {
       inset = 0;
     }
 
@@ -1506,9 +1530,16 @@ export class WindowManager extends GObject.Object {
           {
             name: "window-create-queue",
             callback: () => {
-              metaWindow.unmaximize(Meta.MaximizeFlags.HORIZONTAL);
-              metaWindow.unmaximize(Meta.MaximizeFlags.VERTICAL);
-              metaWindow.unmaximize(Meta.MaximizeFlags.BOTH);
+              try {
+                // GNOME 49+
+                metaWindow.set_unmaximize_flags(Meta.MaximizeFlags.BOTH);
+                metaWindow.unmaximize();
+              } catch (e) {
+                // pre-49 fallback
+                metaWindow.unmaximize(Meta.MaximizeFlags.HORIZONTAL);
+                metaWindow.unmaximize(Meta.MaximizeFlags.VERTICAL);
+                metaWindow.unmaximize(Meta.MaximizeFlags.BOTH);
+              }
               this.renderTree("window-create", true);
             },
           },
@@ -1727,7 +1758,17 @@ export class WindowManager extends GObject.Object {
         this._handleMoving(focusNodeWindow);
       }
     } else {
-      if (focusMetaWindow.get_maximized() === 0) {
+      if (
+        (() => {
+          try {
+            // GNOME 49+
+            return !focusMetaWindow.is_maximized();
+          } catch (e) {
+            // pre-49 fallback
+            return focusMetaWindow.get_maximized() === 0;
+          }
+        })()
+      ) {
         this.renderTree(from);
       }
     }
@@ -1765,9 +1806,18 @@ export class WindowManager extends GObject.Object {
     let monWsNoMaxWindows = activeWsNode.getNodeByType(NODE_TYPES.MONITOR).filter((monitor) => {
       return (
         monitor.getNodeByType(NODE_TYPES.WINDOW).filter((w) => {
-          return (
-            w.nodeValue.get_maximized() === Meta.MaximizeFlags.BOTH || w.nodeValue.is_fullscreen()
-          );
+          return (() => {
+            try {
+              // GNOME 49+
+              return w.nodeValue.is_maximized() || w.nodeValue.is_fullscreen();
+            } catch (e) {
+              // pre-49 fallback
+              return (
+                w.nodeValue.get_maximized() === Meta.MaximizeFlags.BOTH ||
+                w.nodeValue.is_fullscreen()
+              );
+            }
+          })();
         }).length === 0
       );
     });
@@ -2410,7 +2460,17 @@ export class WindowManager extends GObject.Object {
     }
     this._grabCleanup(focusNodeWindow);
 
-    if (focusMetaWindow.get_maximized() === 0) {
+    if (
+      (() => {
+        try {
+          // GNOME 49+
+          return !focusMetaWindow.is_maximized();
+        } catch (e) {
+          // pre-49 fallback
+          return focusMetaWindow.get_maximized() === 0;
+        }
+      })()
+    ) {
       this.renderTree("grab-op-end");
     }
 
diff --git a/metadata.json b/metadata.json
index d975ab0..d9c4f4b 100644
--- a/metadata.json
+++ b/metadata.json
@@ -4,7 +4,7 @@
   "gettext-domain": "forge",
   "uuid": "forge@jmmaranan.com",
   "settings-schema": "org.gnome.shell.extensions.forge",
-  "shell-version": ["45", "46", "47", "48"],
+  "shell-version": ["45", "46", "47", "48", "49"],
   "session-modes": ["user", "unlock-dialog"],
   "url": "https://github.com/forge-ext/forge"
 }