diff --git a/src/renderer/OpenGL.zig b/src/renderer/OpenGL.zig
index 430148f73..120848940 100644
--- a/src/renderer/OpenGL.zig
+++ b/src/renderer/OpenGL.zig
@@ -1259,6 +1259,12 @@ pub fn setScreenSize(
     if (single_threaded_draw) self.draw_mutex.lock();
     defer if (single_threaded_draw) self.draw_mutex.unlock();
 
+    // Reset our buffer sizes so that we free memory when the screen shrinks.
+    // This could be made more clever by only doing this when the screen
+    // shrinks but the performance cost really isn't that much.
+    self.cells.clearAndFree(self.alloc);
+    self.cells_bg.clearAndFree(self.alloc);
+
     // Store our screen size
     self.screen_size = dim;
     self.padding.explicit = pad;