diff --git a/pkgs/development/compilers/mono/6.nix b/pkgs/development/compilers/mono/6.nix
index 04028648a255..1a7297af918e 100644
--- a/pkgs/development/compilers/mono/6.nix
+++ b/pkgs/development/compilers/mono/6.nix
@@ -2,8 +2,8 @@
 
 callPackage ./generic.nix ({
   inherit Foundation libobjc;
-  version = "6.12.0.90";
+  version = "6.12.0.122";
   srcArchiveSuffix = "tar.xz";
-  sha256 = "1b6d0926rd0nkmsppwjgmwsxx1479jjvr1gm7zwk64siml15rpji";
+  sha256 = "sha256-KcJ3Zg/F51ExB67hy/jFBXyTcKTN/tovx4G+aYbYnSM=";
   enableParallelBuilding = true;
 })