diff --git a/nix/magic.nix b/nix/magic.nix
index 09282cd..d70f7db 100644
--- a/nix/magic.nix
+++ b/nix/magic.nix
@@ -45,8 +45,8 @@
   cairo,
   python3,
   gnused,
-  rev ? "0c36365db8921397a258abbea0369cee8d560c99",
-  sha256 ? "sha256-Ksi6eqJRsyT7Vd/CUYarF5XDpN18m/k/kTue26Zf2EU=",
+  rev ? "8.3.498",
+  sha256 ? "sha256-kh6S0qw/Aq64OKkMYyqIDIZRaBsW27+1XkdqYErGGaA=",
 }:
 clangStdenv.mkDerivation {
   name = "magic-vlsi";
diff --git a/nix/netgen.nix b/nix/netgen.nix
index 239a111..775187e 100644
--- a/nix/netgen.nix
+++ b/nix/netgen.nix
@@ -19,8 +19,8 @@
   tk,
   m4,
   python3,
-  rev ? "1.5.278",
-  sha256 ? "sha256-MiA26PLu1rcu2bC0GM30c/c1KVgVvJGup9d22G8TA6w=",
+  rev ? "1.5.286",
+  sha256 ? "sha256-mtV+ftk1HdnpyOUW6+iN3hQ9EZ191XQBSdUe3rfCqIw=",
 }:
 clangStdenv.mkDerivation {
   name = "netgen";
diff --git a/nix/ngspice.nix b/nix/ngspice.nix
index 90cb46a..d92b31c 100644
--- a/nix/ngspice.nix
+++ b/nix/ngspice.nix
@@ -46,7 +46,7 @@
   libtool,
   readline,
   llvmPackages,
-  version ? "42",
+  version ? "43",
 }:
 clangStdenv.mkDerivation {
   name = "ngspice";
@@ -54,7 +54,7 @@ clangStdenv.mkDerivation {
 
   src = fetchurl {
     url = "mirror://sourceforge/ngspice/ngspice-${version}.tar.gz";
-    hash = "sha256-c3/jhGqyMzolDfrfHtbr4YYK8dil/154A8dyzEJW5Qo=";
+    hash = "sha256-FN1qbwhTHyBRwTrmN5CkVwi9Q/PneIamqEiYwpexNpk=";
   };
 
   nativeBuildInputs = [
diff --git a/nix/xschem.nix b/nix/xschem.nix
index 12ce686..ab7d9e3 100644
--- a/nix/xschem.nix
+++ b/nix/xschem.nix
@@ -46,13 +46,13 @@
 }:
 stdenv.mkDerivation {
   pname = "xschem";
-  version = "3.4.5-34-gf850877b"; # Run 'git describe' on the xschem repo
+  version = "3.4.5-114-g346666e1"; # Run 'git describe' on the xschem repo
 
   src = fetchFromGitHub {
     owner = "StefanSchippers";
     repo = "xschem";
-    rev = "f850877b1e0fa6fc36ac4624f0a1ed1473ea7b52";
-    sha256 = "sha256-923iwqodpR7TpxGl6J7BhPhx2Vi8/cDbL02n8fSTzO4=";
+    rev = "346666e13dcd0472e27647fdbe5d7bb04d383186";
+    sha256 = "sha256-CPaiULITbCEkN/QTJ/9diwXqu3vZ/Dszto8VOSW9Jaw=";
   };
 
   nativeBuildInputs = [bison flex pkg-config];