diff --git a/pkgs/development/libraries/gmp/6.2.1-CVE-2021-43618.patch b/pkgs/development/libraries/gmp/6.2.1-CVE-2021-43618.patch
deleted file mode 100644
index eec8206dba0..00000000000
--- a/pkgs/development/libraries/gmp/6.2.1-CVE-2021-43618.patch
+++ /dev/null
@@ -1,19 +0,0 @@
-https://gmplib.org/repo/gmp-6.2/raw-rev/561a9c25298e
-
-diff -r e1fd9db13b47 -r 561a9c25298e mpz/inp_raw.c
---- a/mpz/inp_raw.c	Tue Dec 22 23:49:51 2020 +0100
-+++ b/mpz/inp_raw.c	Thu Oct 21 19:06:49 2021 +0200
-@@ -88,8 +88,11 @@
- 
-   abs_csize = ABS (csize);
- 
-+  if (UNLIKELY (abs_csize > ~(mp_bitcnt_t) 0 / 8))
-+    return 0; /* Bit size overflows */
-+
-   /* round up to a multiple of limbs */
--  abs_xsize = BITS_TO_LIMBS (abs_csize*8);
-+  abs_xsize = BITS_TO_LIMBS ((mp_bitcnt_t) abs_csize * 8);
- 
-   if (abs_xsize != 0)
-     {
-
diff --git a/pkgs/development/libraries/gmp/6.x.nix b/pkgs/development/libraries/gmp/6.x.nix
index 7857bfa0e35..44874246b6e 100644
--- a/pkgs/development/libraries/gmp/6.x.nix
+++ b/pkgs/development/libraries/gmp/6.x.nix
@@ -13,15 +13,13 @@ let inherit (lib) optional; in
 
 let self = stdenv.mkDerivation rec {
   pname = "gmp${lib.optionalString cxx "-with-cxx"}";
-  version = "6.2.1";
+  version = "6.3.0";
 
   src = fetchurl { # we need to use bz2, others aren't in bootstrapping stdenv
     urls = [ "mirror://gnu/gmp/gmp-${version}.tar.bz2" "ftp://ftp.gmplib.org/pub/gmp-${version}/gmp-${version}.tar.bz2" ];
-    sha256 = "0z2ddfiwgi0xbf65z4fg4hqqzlhv0cc6hdcswf3c6n21xdmk5sga";
+    hash = "sha256-rCghGnz7YJuuLiyNYFjWbI/pZDT3QM9v4uR7AA0cIMs=";
   };
 
-  patches = [ ./6.2.1-CVE-2021-43618.patch ];
-
   #outputs TODO: split $cxx due to libstdc++ dependency
   # maybe let ghc use a version with *.so shared with rest of nixpkgs and *.a added
   # - see #5855 for related discussion