diff --git a/pkgs/development/python-modules/appthreat-vulnerability-db/default.nix b/pkgs/development/python-modules/appthreat-vulnerability-db/default.nix
index 662f21e94cbc..17626ca23f52 100644
--- a/pkgs/development/python-modules/appthreat-vulnerability-db/default.nix
+++ b/pkgs/development/python-modules/appthreat-vulnerability-db/default.nix
@@ -9,6 +9,7 @@
 , packageurl-python
 , pytestCheckHook
 , pythonOlder
+, pythonRelaxDepsHook
 , semver
 , tabulate
 }:
@@ -27,6 +28,22 @@ buildPythonPackage rec {
     hash = "sha256-lbaDoLEOMzMGwqBx6gBynVpXz/NM/uCJELwd4d1IEwk=";
   };
 
+  postPatch = ''
+    substituteInPlace pytest.ini \
+      --replace " --cov-append --cov-report term --cov vdb" ""
+    # https://github.com/AppThreat/vulnerability-db/pull/48
+    substituteInPlace vdb/lib/utils.py \
+      --replace "isvalid(" "is_valid("
+  '';
+
+  pythonRelaxDeps = [
+    "semver"
+  ];
+
+  nativeBuildInputs = [
+    pythonRelaxDepsHook
+  ];
+
   propagatedBuildInputs = [
     appdirs
     cvss
@@ -42,11 +59,6 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  postPatch = ''
-    substituteInPlace pytest.ini \
-      --replace " --cov-append --cov-report term --cov vdb" ""
-  '';
-
   preCheck = ''
     export HOME=$(mktemp -d);
   '';