diff --git a/requirements.txt b/requirements.txt
index 2d8f27ca..fd93a32f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,10 @@ accelerate==1.12.0
 addict==2.4.0
 blobfile==3.0.0
 datasets==4.4.2
-diffusers==0.38.0
+# MiniMax H3 (PR #14355) is merged into diffusers main but ships in no release yet:
+# 0.39.0 predates the merge. Pinned to the merge commit on main; switch to the next
+# stable release once it is out.
+diffusers @ git+https://github.com/huggingface/diffusers.git@f53d552036a0d1bd5570782a39cd40cfabf112bc
 fastapi==0.128.8
 httpx[http2]==0.28.1
 ltx-core @ git+https://github.com/Lightricks/LTX-2.git@780984275fd47128b02bef9b5c085404276866ee#subdirectory=packages/ltx-core