diff --git a/pkgs/tools/admin/lexicon/default.nix b/pkgs/tools/admin/lexicon/default.nix
index 31f4fec67f5..4f02615b4a2 100644
--- a/pkgs/tools/admin/lexicon/default.nix
+++ b/pkgs/tools/admin/lexicon/default.nix
@@ -31,15 +31,20 @@ in
 
 buildPythonApplication rec {
   pname = "lexicon";
-  version = "3.3.27";
+  version = "3.4.3";
+  format = "pyproject";
 
   src = fetchFromGitHub {
     owner = "AnalogJ";
     repo = pname;
     rev = "v${version}";
-    sha256 = "0i6grrpdwh7axhnsabb0pfjhpd3prc9ji1afivi7q3c0krgvncmc";
+    sha256 = "1ym4gj4xyd69rsc5niilvcb72gys22rjxhj4qd574vyx3ryl34za";
   };
 
+  nativeBuildInputs = [
+    poetry
+  ];
+
   propagatedBuildInputs = [
     beautifulsoup4
     boto3