diff --git a/frontend/libs/components/promptbox/src/lib/PromptBox3D.tsx b/frontend/libs/components/promptbox/src/lib/PromptBox3D.tsx
index 105fb5d8ed..6dbf2a1858 100644
--- a/frontend/libs/components/promptbox/src/lib/PromptBox3D.tsx
+++ b/frontend/libs/components/promptbox/src/lib/PromptBox3D.tsx
@@ -641,7 +641,7 @@ export const PromptBox3D = ({
               ref={textareaRef}
               rows={1}
               placeholder="Describe your image..."
-              className="text-md mb-2 max-h-[5.5em] flex-1 resize-none overflow-y-auto rounded bg-transparent pb-2 pr-2 pt-1 text-white placeholder-white placeholder:text-white/60 focus:outline-none"
+              className="text-md mb-2 max-h-[5.5em] min-h-[36px] flex-1 resize-none overflow-y-auto rounded bg-transparent pb-2 pr-2 pt-1 text-white placeholder-white placeholder:text-white/60 focus:outline-none"
               value={prompt}
               onChange={handleChange}
               onPaste={handlePaste}