diff --git a/pyproject.toml b/pyproject.toml
index e73545b..f28bc0f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ dependencies = [
     "uvicorn[standard]>=0.34,<1.0",
     "XlsxWriter>=3.2,<4.0",
     "pypdf>=6,<7",
-    "pypdfium2>=5,<6",
+    "pypdfium2>=5.13.0,<6",
     "Pillow>=11,<13",
 ]