diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index af0d10ef4..65e27107a 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -25,7 +25,8 @@ data-process = [
     "celery>=5.3.6",
     "flower>=2.0.1",
     "nest_asyncio>=1.5.6",
-    "unstructured[csv,docx,pdf,pptx,xlsx,md]==0.18.14"
+    "unstructured[csv,docx,pdf,pptx,xlsx,md]==0.18.14",
+    "huggingface_hub>=0.19.0,<0.21.0"
 ]
 test = [
     "pytest",
diff --git a/make/data_process/Dockerfile b/make/data_process/Dockerfile
index e7550fe2d..35d7a6c48 100644
--- a/make/data_process/Dockerfile
+++ b/make/data_process/Dockerfile
@@ -42,6 +42,9 @@ RUN uv sync --no-cache-dir --extra data-process $(test -n "$MIRROR" && echo "-i
 COPY sdk /opt/sdk
 RUN uv pip install --no-cache-dir /opt/sdk $(test -n "$MIRROR" && echo "-i $MIRROR") && \
     uv cache clean
+
+# Pre-download tiktoken cl100k_base model to avoid network issues during runtime
+RUN uv run python -c "import tiktoken; enc = tiktoken.get_encoding('cl100k_base')"
 # Layer 3: copy backend code
 COPY backend /opt/backend