diff --git a/pkgs/development/python-modules/pysmi/default.nix b/pkgs/development/python-modules/pysmi/default.nix
index 194182525b88..454b5d0402b9 100644
--- a/pkgs/development/python-modules/pysmi/default.nix
+++ b/pkgs/development/python-modules/pysmi/default.nix
@@ -2,9 +2,9 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  flit-core,
   jinja2,
   ply,
-  poetry-core,
   pysmi,
   pysnmp,
   pytestCheckHook,
@@ -13,7 +13,7 @@
 }:
 
 buildPythonPackage rec {
-  version = "1.5.10";
+  version = "1.6.2";
   pname = "pysmi";
   pyproject = true;
 
@@ -23,10 +23,10 @@ buildPythonPackage rec {
     owner = "lextudio";
     repo = "pysmi";
     tag = "v${version}";
-    hash = "sha256-fJwMkOzI5IrDEyH6wV/zD79k6rzuuqDvfZkuHC44TGY=";
+    hash = "sha256-GyG3J6qntEIszXrm1t623+x1cYbhJLbTEQl6N2h2LA0=";
   };
 
-  build-system = [ poetry-core ];
+  build-system = [ flit-core ];
 
   dependencies = [
     ply