diff --git a/.github/workflows/update-ruby.yml b/.github/workflows/update-ruby.yml
index e14286dc..ab982c07 100644
--- a/.github/workflows/update-ruby.yml
+++ b/.github/workflows/update-ruby.yml
@@ -10,7 +10,7 @@ on:
       openssl_version:
             description: 'OpenSSL version'
             required: true
-            default: '3.0.14'
+            default: '3.0.15'
 
   repository_dispatch:
     types: [update-ruby]
diff --git a/share/ruby-build/3.4.0-rc1 b/share/ruby-build/3.4.0-rc1
index 836bea71..9f51444f 100644
--- a/share/ruby-build/3.4.0-rc1
+++ b/share/ruby-build/3.4.0-rc1
@@ -1,2 +1,2 @@
-install_package "openssl-3.0.14" "https://github.com/openssl/openssl/releases/download/openssl-3.0.14/openssl-3.0.14.tar.gz#eeca035d4dd4e84fc25846d952da6297484afa0650a6f84c682e39df3a4123ca" openssl --if needs_openssl:1.0.2-3.x.x
+install_package "openssl-3.0.15" "https://github.com/openssl/openssl/releases/download/openssl-3.0.15/openssl-3.0.15.tar.gz#23c666d0edf20f14249b3d8f0368acaee9ab585b09e1de82107c66e1f3ec9533" openssl --if needs_openssl:1.0.2-3.x.x
 install_package "ruby-3.4.0-rc1" "https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.tar.gz#1f3187d3366e90af6d760994f8bfe1fe8999a8ba3553ea4dcfae63e548236e2a" enable_shared standard