diff --git a/requirements.txt b/requirements.txt
index 22e2354..fac094c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,6 +18,7 @@ opencv-python-headless
 # Optional (ASR for audio/video in corpus_builder.py)
 openai-whisper
 torch
+diffusers>=0.35.2
 
 # Notes (external binaries, install via system package manager):
 # - pandoc (for high‑quality Markdown→PDF)