diff --git a/pkgs/development/python-modules/pyhanko-certvalidator/default.nix b/pkgs/development/python-modules/pyhanko-certvalidator/default.nix
index 8d3037baa454..e55936a8e41c 100644
--- a/pkgs/development/python-modules/pyhanko-certvalidator/default.nix
+++ b/pkgs/development/python-modules/pyhanko-certvalidator/default.nix
@@ -16,7 +16,7 @@
 
 buildPythonPackage rec {
   pname = "pyhanko-certvalidator";
-  version = "0.26.2";
+  version = "0.26.3";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -25,7 +25,7 @@ buildPythonPackage rec {
     owner = "MatthiasValvekens";
     repo = "certvalidator";
     rev = "refs/tags/v${version}";
-    hash = "sha256-yGFaRpAOTbuVfY5UefC1sdJS4FFkgkIZnHHG35p3n3E=";
+    hash = "sha256-uUmsWiN182g+kxrCny7UNLDHdAdqKk64w6vnjmGBNjM=";
   };
 
   postPatch = ''
@@ -68,8 +68,8 @@ buildPythonPackage rec {
     "test_revocation_mode_hard_aiohttp_autofetch"
     # The path could not be validated because no revocation information could be found for intermediate certificate 1
     "test_revocation_mode_hard"
-    # certificate expired 2022-09-17
-    "test_revocation_mode_soft"
+    # ValueError: Hash algorithm not known for ed448
+    "test_ed"
   ];
 
   pythonImportsCheck = [