diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a25c09e..be1f749 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,7 +41,7 @@ on:
         default: ""
 
 env:
-  SPC_VERSION: "v3.0.0-pgo-rc18"
+  SPC_VERSION: "v3.0.0-pgo-rc19"
   # OPcache's supported_sapis allowlist (PHP < 8.5 only; 8.5 removed it)
   # rejects SAPI names it doesn't know, so embed-based runtimes get
   # opcache_get_status() === false even with opcache.enable=1. The spc fork
diff --git a/.github/workflows/extensions.yml b/.github/workflows/extensions.yml
index 34b8f98..7bf466e 100644
--- a/.github/workflows/extensions.yml
+++ b/.github/workflows/extensions.yml
@@ -60,7 +60,7 @@ on:
         default: "igbinary,msgpack,apcu,redis,mongodb"
 
 env:
-  SPC_VERSION: "v3.0.0-pgo-rc17"
+  SPC_VERSION: "v3.0.0-pgo-rc19"
 
 jobs:
   # Resolve the platform input into a Linux matrix, mirroring build.yml.setup.
diff --git a/.github/workflows/mirror-deps.yml b/.github/workflows/mirror-deps.yml
index a204c7f..bfcf2fa 100644
--- a/.github/workflows/mirror-deps.yml
+++ b/.github/workflows/mirror-deps.yml
@@ -81,7 +81,7 @@ on:
 
 env:
   # Keep in lockstep with build.yml and extensions.yml.
-  SPC_VERSION: "v3.0.0-pgo-rc17"
+  SPC_VERSION: "v3.0.0-pgo-rc19"
   PHP_EXTENSIONS: "bcmath,bz2,calendar,ctype,curl,dom,exif,fileinfo,filter,ftp,gd,gettext,gmp,hash,iconv,intl,mbregex,mbstring,mysqli,mysqlnd,opcache,openssl,pcntl,pcre,pdo,pdo_mysql,pdo_pgsql,pdo_sqlite,pgsql,phar,posix,session,simplexml,soap,sodium,sqlite3,sysvmsg,sysvsem,sysvshm,tokenizer,xml,xmlreader,xmlwriter,xsl,zip,zlib"
   MIRROR_TAG: "php-sources"
   MANIFEST_NAME: "gnu-deps-manifest.txt"