diff --git a/pkgs/by-name/si/signaturepdf/package.nix b/pkgs/by-name/si/signaturepdf/package.nix
index 6da2237c97e3..e0e6cf3f08c4 100644
--- a/pkgs/by-name/si/signaturepdf/package.nix
+++ b/pkgs/by-name/si/signaturepdf/package.nix
@@ -13,13 +13,13 @@
 
 stdenv.mkDerivation rec {
   pname = "signaturepdf";
-  version = "1.9.0";
+  version = "1.9.1";
 
   src = fetchFromGitHub {
     owner = "24eme";
     repo = "signaturepdf";
     rev = "v${version}";
-    hash = "sha256-DLPLloSt9yMEWFqmplQ8WictanlwRc4oQbTEQLUxR+E=";
+    hash = "sha256-HKHlIsOdCeU1yYPQZJ+npz/MjKhWf7PZ4nfWxRUTEUc=";
   };
 
   nativeBuildInputs = [ makeWrapper ];