diff --git a/pkgs/development/compilers/gcc/4.5/default.nix b/pkgs/development/compilers/gcc/4.5/default.nix
index 4c449fc781f..b3c639c6f0a 100644
--- a/pkgs/development/compilers/gcc/4.5/default.nix
+++ b/pkgs/development/compilers/gcc/4.5/default.nix
@@ -40,7 +40,7 @@ assert libelf != null -> zlib != null;
 with stdenv.lib;
 with builtins;
 
-let version = "4.5.2";
+let version = "4.5.3";
     javaEcj = fetchurl {
       # The `$(top_srcdir)/ecj.jar' file is automatically picked up at
       # `configure' time.
diff --git a/pkgs/development/compilers/gcc/4.6/default.nix b/pkgs/development/compilers/gcc/4.6/default.nix
index 09f5396216d..d630f5562c5 100644
--- a/pkgs/development/compilers/gcc/4.6/default.nix
+++ b/pkgs/development/compilers/gcc/4.6/default.nix
@@ -42,7 +42,7 @@ assert libelf != null -> zlib != null;
 with stdenv.lib;
 with builtins;
 
-let version = "4.6.2";
+let version = "4.6.3";
     javaEcj = fetchurl {
       # The `$(top_srcdir)/ecj.jar' file is automatically picked up at
       # `configure' time.