diff --git a/src/components/header/export-dialog.tsx b/src/components/header/export-dialog.tsx
index 2857c29..5f66fbd 100644
--- a/src/components/header/export-dialog.tsx
+++ b/src/components/header/export-dialog.tsx
@@ -117,9 +117,11 @@ export function ExportImageDialog({
     }
 
     if (previewRef.current && previewRef.current.itemRefs.current && previewRef.current.containerRef.current) {
-      generateImages()
+      if (isExportModalOpen) {
+        generateImages()
+      }
     }
-  }, [previewRef, scale, setIsExporting, isExporting])
+  }, [previewRef, scale, setIsExporting, isExporting, isExportModalOpen])
 
   const exportImages = useCallback(async () => {
     const zip = new JSZip()
diff --git a/src/components/header/header.tsx b/src/components/header/header.tsx
index 091c0dc..bc213d5 100644
--- a/src/components/header/header.tsx
+++ b/src/components/header/header.tsx
@@ -80,11 +80,6 @@ export function Header(props: HeaderProps) {
   const { toast } = useToast()
   const fileRef = useRef<HTMLInputElement>(null)
 
-  useEffect(() => {
-    // Regenerate images when the contents are updated
-    setIsExporting(true)
-  }, [contents])
-
   useEffect(() => {
     function handleKeyDown(e: KeyboardEvent) {
       if (e.key === 'o' && (e.metaKey || e.ctrlKey)) {