diff --git a/Ports/AvailablePorts.md b/Ports/AvailablePorts.md
index 39d787cd86..06acc41eac 100644
--- a/Ports/AvailablePorts.md
+++ b/Ports/AvailablePorts.md
@@ -12,7 +12,7 @@ Please make sure to keep this list up to date when adding and updating ports. :^
 | [`binutils`](binutils/)                | GNU Binutils                                                    | 2.37                     | https://www.gnu.org/software/binutils/                                         |
 | [`bison`](bison/)                      | GNU Bison                                                       | 1.25                     | https://www.gnu.org/software/bison/                                            |
 | [`brogue`](brogue/)                    | BrogueCE                                                        | 1.9.3                    | https://github.com/tmewett/BrogueCE                                            |
-| [`byacc`](byacc/)                      | Berkeley Yacc                                                   | 20191125                 | https://invisible-island.net/byacc/byacc.html                                  |
+| [`byacc`](byacc/)                      | Berkeley Yacc                                                   | 20210808                 | https://invisible-island.net/byacc/byacc.html                                  |
 | [`bzip2`](bzip2/)                      | bzip2                                                           | 1.0.8                    | https://sourceware.org/bzip2/                                                  |
 | [`carl`](carl/)                        | Crypto Ancienne Resource Loader                                 | 1.5                      | https://github.com/classilla/cryanc                                            |
 | [`c-ray`](c-ray/)                      | C-Ray                                                           | c094d64                  | https://github.com/vkoskiv/c-ray                                               |
diff --git a/Ports/byacc/package.sh b/Ports/byacc/package.sh
index 1e8febf987..146b3fbdde 100755
--- a/Ports/byacc/package.sh
+++ b/Ports/byacc/package.sh
@@ -1,9 +1,9 @@
 #!/usr/bin/env -S bash ../.port_include.sh
 port=byacc
-version=20191125
+version=20210808
 files="https://invisible-mirror.net/archives/byacc/byacc-${version}.tgz byacc-${version}.tgz
 https://invisible-mirror.net/archives/byacc/byacc-${version}.tgz.asc byacc-${version}.tgz.asc"
 useconfigure=true
 auth_type="sig"
-auth_import_key="C52048C0C0748FEE227D47A2702353E0F7E48EDB"
+auth_import_key="19882D92DDA4C400C22C0D56CC2AF4472167BE03"
 auth_opts=("byacc-${version}.tgz.asc" "byacc-${version}.tgz")
diff --git a/Ports/byacc/patches/fix-autoconf.patch b/Ports/byacc/patches/fix-autoconf.patch
deleted file mode 100644
index c9a00a47b8..0000000000
--- a/Ports/byacc/patches/fix-autoconf.patch
+++ /dev/null
@@ -1,10 +0,0 @@
---- byacc-20191125/config.sub.orig	Thu Jan 23 16:57:22 2020
-+++ byacc-20191125/config.sub	Thu Jan 23 16:57:33 2020
-@@ -1339,6 +1339,7 @@
- 	# Each alternative MUST end in a * to match a version number.
- 	# sysv* is not here because it comes later, after sysvr4.
- 	gnu* | bsd* | mach* | minix* | genix* | ultrix* | irix* \
-+	     | serenity* \
- 	     | *vms* | esix* | aix* | cnk* | sunos | sunos[34]*\
- 	     | hpux* | unos* | osf* | luna* | dgux* | auroraux* | solaris* \
- 	     | sym* | kopensolaris* | plan9* \