diff --git a/pkgs/development/python-modules/yangson/default.nix b/pkgs/development/python-modules/yangson/default.nix
index 44ac6cf9fe1e..1b63a94cb273 100644
--- a/pkgs/development/python-modules/yangson/default.nix
+++ b/pkgs/development/python-modules/yangson/default.nix
@@ -8,12 +8,12 @@
 
 buildPythonPackage rec {
   pname = "yangson";
-  version = "1.4.8";
+  version = "1.4.9";
   format = "setuptools";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "11w4aq0w2rnkz1axgmw003z2snd4kc49dil6kp1ajlqnfh1pcx8m";
+    sha256 = "1qb8zssyj504yrj1jnkrzv65xlfv5bl14knan76pjzbpl0xpaq6z";
   };
 
   nativeBuildInputs = [