diff --git a/pkgs/applications/science/electronics/ngspice/default.nix b/pkgs/applications/science/electronics/ngspice/default.nix
index 196374706e1..4777c89e876 100644
--- a/pkgs/applications/science/electronics/ngspice/default.nix
+++ b/pkgs/applications/science/electronics/ngspice/default.nix
@@ -2,11 +2,11 @@
 , readline, libX11, libICE, libXaw, libXmu, libXext, libXt, fftw }:
 
 stdenv.mkDerivation {
-  name = "ngspice-28";
+  name = "ngspice-29";
 
   src = fetchurl {
-    url = "mirror://sourceforge/ngspice/ngspice-28.tar.gz";
-    sha256 = "0rnz2rdgyav16w7wfn3sfrk2lwvvgz1fh0l9107zkcldijklz04l";
+    url = "mirror://sourceforge/ngspice/ngspice-29.tar.gz";
+    sha256 = "0jjwz73naq7l9yhwdqbpnrfckywp2ffkppivxjv8w92zq7xhyvcd";
   };
 
   nativeBuildInputs = [ flex bison ];