diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 82733d11..4b5d32f2 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -21,7 +21,7 @@ dependencies = [
     "myst-parser==4.0.1",
     "nltk==3.9.1",
     "openai==1.100.2",
-    "pypdf==6.0.0",
+    "pypdf==6.1.3",
     "rank-bm25==0.2.2",
     "sentence-transformers>=5.1.0",
     "sphinx==8.1.3",