diff --git a/Ports/AvailablePorts.md b/Ports/AvailablePorts.md
index a0fec8b3b8f..1d176effd10 100644
--- a/Ports/AvailablePorts.md
+++ b/Ports/AvailablePorts.md
@@ -211,7 +211,7 @@ This list is also available at [ports.serenityos.net](https://ports.serenityos.n
 | [`milkytracker`](milkytracker/)                     | milkytracker                                                    | 1.03.00                   | https://github.com/milkytracker/MilkyTracker                                   |
 | [`mold`](mold/)                                     | A Modern Linker                                                 | 1.5.1                     | https://github.com/rui314/mold                                                 |
 | [`mpc`](mpc/)                                       | GNU Multiple Precision Complex Library (MPC)                    | 1.3.1                     | http://www.multiprecision.org/mpc/                                             |
-| [`mpfr`](mpfr/)                                     | GNU Multiple Precision Floating-Point Reliable Library (MPFR)   | 4.1.0                     | https://www.mpfr.org/                                                          |
+| [`mpfr`](mpfr/)                                     | GNU Multiple Precision Floating-Point Reliable Library (MPFR)   | 4.2.1                     | https://www.mpfr.org/                                                          |
 | [`mrsh`](mrsh/)                                     | mrsh                                                            | cd3c3a4                   | https://mrsh.sh/                                                               |
 | [`mruby`](mruby/)                                   | mruby                                                           | 3.0.0                     | https://mruby.org/                                                             |
 | [`mysthous`](mysthous/)                             | Hi-Res Adventure #1: Mystery House                              | 1.0                       | https://www.scummvm.org/games/#games-hires1                                    |
diff --git a/Ports/mpfr/package.sh b/Ports/mpfr/package.sh
index 1df494532a0..8fe53f1e7f0 100755
--- a/Ports/mpfr/package.sh
+++ b/Ports/mpfr/package.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env -S bash ../.port_include.sh
 port='mpfr'
-version='4.1.0'
+version='4.2.1'
 useconfigure='true'
 use_fresh_config_sub='true'
 configopts=(
@@ -8,7 +8,7 @@ configopts=(
     '--with-sysroot=/'
 )
 files=(
-    "https://ftpmirror.gnu.org/gnu/mpfr/mpfr-${version}.tar.xz#0c98a3f1732ff6ca4ea690552079da9c597872d30e96ec28414ee23c95558a7f"
+    "https://ftpmirror.gnu.org/gnu/mpfr/mpfr-${version}.tar.xz#277807353a6726978996945af13e52829e3abd7a9a5b7fb2793894e18f1fcbb2"
 )
 depends=(
     'gmp'