diff --git a/pkgs/development/libraries/opencascade/default.nix b/pkgs/development/libraries/opencascade/default.nix
index 4a12217443c5..05d78488957a 100644
--- a/pkgs/development/libraries/opencascade/default.nix
+++ b/pkgs/development/libraries/opencascade/default.nix
@@ -2,10 +2,10 @@
 ftgl, freetype}:
 
 stdenv.mkDerivation rec {
-  name = "opencascade-oce-0.17.2";
+  name = "opencascade-oce-0.18.3";
   src = fetchurl {
-    url = https://github.com/tpaviot/oce/archive/OCE-0.17.2.tar.gz;
-    sha256 = "0vpmnb0k5y2f7lpmwx9pg9yfq24zjvnsak5alzacncfm1hv9b6cd";
+    url = https://github.com/tpaviot/oce/archive/OCE-0.18.3.tar.gz;
+    sha256 = "0v4ny0qhr5hiialb2ss25bllfnd6j4g7mfxnqfmr1xsjpykxcly5";
   };
 
   buildInputs = [ libGLU_combined tcl tk file libXmu libtool qt4 ftgl freetype cmake ];