diff --git a/3.4-rc/alpine3.20/Dockerfile b/3.4-rc/alpine3.20/Dockerfile
index 7d62a786a..4d1ede484 100644
--- a/3.4-rc/alpine3.20/Dockerfile
+++ b/3.4-rc/alpine3.20/Dockerfile
@@ -24,10 +24,10 @@ RUN set -eux; \
 
 ENV LANG C.UTF-8
 
-# https://www.ruby-lang.org/en/news/2024/10/07/ruby-3-4-0-preview2-released/
-ENV RUBY_VERSION 3.4.0-preview2
-ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview2.tar.xz
-ENV RUBY_DOWNLOAD_SHA256 626bf4fe952323c15ec9a8999f470ec136ef91c0fc34c484646aaaa9a0b62ca7
+# https://www.ruby-lang.org/en/news/2024/12/12/ruby-3-4-0-rc1-released/
+ENV RUBY_VERSION 3.4.0-rc1
+ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.tar.xz
+ENV RUBY_DOWNLOAD_SHA256 9c54225747f7a786727aa6213503083d5d8ff7097505d4b7456ff60880ee4a17
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built
diff --git a/3.4-rc/alpine3.21/Dockerfile b/3.4-rc/alpine3.21/Dockerfile
index 9ae3322aa..ae79b8a91 100644
--- a/3.4-rc/alpine3.21/Dockerfile
+++ b/3.4-rc/alpine3.21/Dockerfile
@@ -24,10 +24,10 @@ RUN set -eux; \
 
 ENV LANG C.UTF-8
 
-# https://www.ruby-lang.org/en/news/2024/10/07/ruby-3-4-0-preview2-released/
-ENV RUBY_VERSION 3.4.0-preview2
-ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview2.tar.xz
-ENV RUBY_DOWNLOAD_SHA256 626bf4fe952323c15ec9a8999f470ec136ef91c0fc34c484646aaaa9a0b62ca7
+# https://www.ruby-lang.org/en/news/2024/12/12/ruby-3-4-0-rc1-released/
+ENV RUBY_VERSION 3.4.0-rc1
+ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.tar.xz
+ENV RUBY_DOWNLOAD_SHA256 9c54225747f7a786727aa6213503083d5d8ff7097505d4b7456ff60880ee4a17
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built
diff --git a/3.4-rc/bookworm/Dockerfile b/3.4-rc/bookworm/Dockerfile
index b7255c414..fea2d9014 100644
--- a/3.4-rc/bookworm/Dockerfile
+++ b/3.4-rc/bookworm/Dockerfile
@@ -13,10 +13,10 @@ RUN set -eux; \
 
 ENV LANG C.UTF-8
 
-# https://www.ruby-lang.org/en/news/2024/10/07/ruby-3-4-0-preview2-released/
-ENV RUBY_VERSION 3.4.0-preview2
-ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview2.tar.xz
-ENV RUBY_DOWNLOAD_SHA256 626bf4fe952323c15ec9a8999f470ec136ef91c0fc34c484646aaaa9a0b62ca7
+# https://www.ruby-lang.org/en/news/2024/12/12/ruby-3-4-0-rc1-released/
+ENV RUBY_VERSION 3.4.0-rc1
+ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.tar.xz
+ENV RUBY_DOWNLOAD_SHA256 9c54225747f7a786727aa6213503083d5d8ff7097505d4b7456ff60880ee4a17
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built
diff --git a/3.4-rc/bullseye/Dockerfile b/3.4-rc/bullseye/Dockerfile
index 22337629c..e7ea548db 100644
--- a/3.4-rc/bullseye/Dockerfile
+++ b/3.4-rc/bullseye/Dockerfile
@@ -13,10 +13,10 @@ RUN set -eux; \
 
 ENV LANG C.UTF-8
 
-# https://www.ruby-lang.org/en/news/2024/10/07/ruby-3-4-0-preview2-released/
-ENV RUBY_VERSION 3.4.0-preview2
-ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview2.tar.xz
-ENV RUBY_DOWNLOAD_SHA256 626bf4fe952323c15ec9a8999f470ec136ef91c0fc34c484646aaaa9a0b62ca7
+# https://www.ruby-lang.org/en/news/2024/12/12/ruby-3-4-0-rc1-released/
+ENV RUBY_VERSION 3.4.0-rc1
+ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.tar.xz
+ENV RUBY_DOWNLOAD_SHA256 9c54225747f7a786727aa6213503083d5d8ff7097505d4b7456ff60880ee4a17
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built
diff --git a/3.4-rc/slim-bookworm/Dockerfile b/3.4-rc/slim-bookworm/Dockerfile
index 0eea038c9..10045e7f2 100644
--- a/3.4-rc/slim-bookworm/Dockerfile
+++ b/3.4-rc/slim-bookworm/Dockerfile
@@ -27,10 +27,10 @@ RUN set -eux; \
 
 ENV LANG C.UTF-8
 
-# https://www.ruby-lang.org/en/news/2024/10/07/ruby-3-4-0-preview2-released/
-ENV RUBY_VERSION 3.4.0-preview2
-ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview2.tar.xz
-ENV RUBY_DOWNLOAD_SHA256 626bf4fe952323c15ec9a8999f470ec136ef91c0fc34c484646aaaa9a0b62ca7
+# https://www.ruby-lang.org/en/news/2024/12/12/ruby-3-4-0-rc1-released/
+ENV RUBY_VERSION 3.4.0-rc1
+ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.tar.xz
+ENV RUBY_DOWNLOAD_SHA256 9c54225747f7a786727aa6213503083d5d8ff7097505d4b7456ff60880ee4a17
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built
diff --git a/3.4-rc/slim-bullseye/Dockerfile b/3.4-rc/slim-bullseye/Dockerfile
index 412425643..0238894b4 100644
--- a/3.4-rc/slim-bullseye/Dockerfile
+++ b/3.4-rc/slim-bullseye/Dockerfile
@@ -27,10 +27,10 @@ RUN set -eux; \
 
 ENV LANG C.UTF-8
 
-# https://www.ruby-lang.org/en/news/2024/10/07/ruby-3-4-0-preview2-released/
-ENV RUBY_VERSION 3.4.0-preview2
-ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview2.tar.xz
-ENV RUBY_DOWNLOAD_SHA256 626bf4fe952323c15ec9a8999f470ec136ef91c0fc34c484646aaaa9a0b62ca7
+# https://www.ruby-lang.org/en/news/2024/12/12/ruby-3-4-0-rc1-released/
+ENV RUBY_VERSION 3.4.0-rc1
+ENV RUBY_DOWNLOAD_URL https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.tar.xz
+ENV RUBY_DOWNLOAD_SHA256 9c54225747f7a786727aa6213503083d5d8ff7097505d4b7456ff60880ee4a17
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built
diff --git a/versions.json b/versions.json
index e61424370..ec5c2a6c9 100644
--- a/versions.json
+++ b/versions.json
@@ -179,39 +179,39 @@
   },
   "3.4": null,
   "3.4-rc": {
-    "version": "3.4.0-preview2",
-    "date": "2024-10-07",
-    "post": "/en/news/2024/10/07/ruby-3-4-0-preview2-released/",
-    "tag": "v3_4_0_preview2",
+    "version": "3.4.0-rc1",
+    "date": "2024-12-12",
+    "post": "/en/news/2024/12/12/ruby-3-4-0-rc1-released/",
+    "tag": "v3_4_0_rc1",
     "stats": {
-      "files_changed": 4422,
-      "insertions": 163889,
-      "deletions": 243380
+      "files_changed": 4820,
+      "insertions": 196907,
+      "deletions": 253488
     },
     "url": {
-      "gz": "https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview2.tar.gz",
-      "zip": "https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview2.zip",
-      "xz": "https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview2.tar.xz"
+      "gz": "https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.tar.gz",
+      "zip": "https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.zip",
+      "xz": "https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-rc1.tar.xz"
     },
     "size": {
-      "gz": 22722332,
-      "zip": 28101194,
-      "xz": 16878876
+      "gz": 23055998,
+      "zip": 28323595,
+      "xz": 17116016
     },
     "sha1": {
-      "gz": "c23265acf6c07b4c1df1e41eebf8b4cf2f25b97b",
-      "zip": "479bd223bca3225fb3a15984e3eae4efb9a40189",
-      "xz": "dbff404b969012702dc500cac72f4d6b3822068e"
+      "gz": "216e3085ab8b886b9f74943ee5b62bd2e3d86671",
+      "zip": "4ae8ce4b15ccc3f0c6f42e408c44aa287a1ccc14",
+      "xz": "1424671cdc9c4bfe3778ac159d917c8bfe6107bd"
     },
     "sha256": {
-      "gz": "443cd7ec54ade4786bc974ce9f5d49f172a60f8edc84b597b7fe2bd2a94b8371",
-      "zip": "e00a6fbf6f9e25a725711a8aac7e38be6bed61de4db9862a405172b96bf38b5b",
-      "xz": "626bf4fe952323c15ec9a8999f470ec136ef91c0fc34c484646aaaa9a0b62ca7"
+      "gz": "1f3187d3366e90af6d760994f8bfe1fe8999a8ba3553ea4dcfae63e548236e2a",
+      "zip": "653162a2db627e8e5feee22a00b20acf215509d88b06ffb281bc8788ed12c74c",
+      "xz": "9c54225747f7a786727aa6213503083d5d8ff7097505d4b7456ff60880ee4a17"
     },
     "sha512": {
-      "gz": "0946d256587597bdf13437a50f7a3298c151133edea161a1c4806a04dcbd8c2e8a7fd617f3eda16c5c05f6e6346317562cc30ba67698f1fdd92237c03bdbd23e",
-      "zip": "0d9ee1c41920e4d594b0f2c40d02339b4e9a2cd5232f5ee914cab5a685cb4a2279fbbfd8fbad40ef0a53866db4e1de96068c62580ede6d8fab02550393bcbe81",
-      "xz": "f23257896a35d3a581cbf5e8c94fe28e45725e39608a7669f47f31085338b1b4929a4db40d826d8fee628afb97b0c25b2f9e7bda4cd42e80c1208c46caf54265"
+      "gz": "0b0420a39c0bf3b38600d4e28805a581c4b5a6cf2abe41be8c8164276a8044a19e676de74eea5dd5b4d7d667d821a6144119795fea510fd4ba6e34865a2ae172",
+      "zip": "c6c6b9a0e61308e3f3303cd148613feabb2ee12d8e2fefc1f4aa1403237310f7c9be5e2031248ea89ff01cdc0bca1a66ff60f9f1f19ed9c9fccef3d7a3bbebb8",
+      "xz": "5b92a2b5829ab23735617945839e45df984b319b8932e790a8e0c6f681b9bd74249511a76345516cc216c002ed7887bdd27151501491d5ecedc20acd3fb57cc5"
     },
     "variants": [
       "bookworm",