diff --git a/pyproject.toml b/pyproject.toml
index 3d8c21d177..872eac0498 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ Changelog = "https://github.com/openoereb/pyramid_oereb/blob/master/CHANGES.rst"
 [project.optional-dependencies]
 # Dependencies listed in "recommend" must be included in "no-version" without explicit version number
 recommend = [
-    "pypdf==4.2.0",
+    "pypdf==4.3.1",
     "filetype==1.2.0",
     "geoalchemy2==0.15.1",
     "pyramid==2.0.2",