diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 29c9ac22..b1d1e7d5 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -23,7 +23,7 @@ dependencies = [
     "onnxruntime~=1.27.0",
     "tokenizers>=0.20.0",
     "huggingface-hub>=0.27.0",
-    "pypdf>=6.12.0",
+    "pypdf>=6.13.3",
     "playwright>=1.44.0",
     "html2text>=2025.4.15",
     "httpx>=0.28.1",