diff --git a/.ruby-version b/.ruby-version
index 2aa51319..fcdb2e10 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.4.7
+4.0.0
diff --git a/Dockerfile b/Dockerfile
index c1ff0d5e..57a5ad08 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.4.7 AS base
+FROM ruby:4.0.0 AS base
 
 RUN bundle config set frozen 'true' && \
     bundle config set path '/vendor/bundle'
diff --git a/Gemfile.lock b/Gemfile.lock
index 3598e810..bbdcb46c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     addressable (2.8.8)
       public_suffix (>= 2.0.2, < 8.0)
     base64 (0.3.0)
-    bigdecimal (3.3.1)
+    bigdecimal (4.0.1)
     colorator (1.1.0)
     concurrent-ruby (1.3.6)
     csv (3.3.5)
@@ -12,47 +12,13 @@ GEM
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     eventmachine (1.2.7)
-    ffi (1.17.2)
-    ffi (1.17.2-aarch64-linux-gnu)
-    ffi (1.17.2-aarch64-linux-musl)
-    ffi (1.17.2-arm-linux-gnu)
-    ffi (1.17.2-arm-linux-musl)
-    ffi (1.17.2-arm64-darwin)
-    ffi (1.17.2-x86-linux-gnu)
-    ffi (1.17.2-x86-linux-musl)
-    ffi (1.17.2-x86_64-darwin)
-    ffi (1.17.2-x86_64-linux-gnu)
-    ffi (1.17.2-x86_64-linux-musl)
+    ffi (1.17.3)
     forwardable-extended (2.6.0)
-    google-protobuf (4.33.2)
+    google-protobuf (4.33.4)
       bigdecimal
       rake (>= 13)
-    google-protobuf (4.33.2-aarch64-linux-gnu)
-      bigdecimal
-      rake (>= 13)
-    google-protobuf (4.33.2-aarch64-linux-musl)
-      bigdecimal
-      rake (>= 13)
-    google-protobuf (4.33.2-arm64-darwin)
-      bigdecimal
-      rake (>= 13)
-    google-protobuf (4.33.2-x86-linux-gnu)
-      bigdecimal
-      rake (>= 13)
-    google-protobuf (4.33.2-x86-linux-musl)
-      bigdecimal
-      rake (>= 13)
-    google-protobuf (4.33.2-x86_64-darwin)
-      bigdecimal
-      rake (>= 13)
-    google-protobuf (4.33.2-x86_64-linux-gnu)
-      bigdecimal
-      rake (>= 13)
-    google-protobuf (4.33.2-x86_64-linux-musl)
-      bigdecimal
-      rake (>= 13)
-    http_parser.rb (0.8.0)
-    i18n (1.14.7)
+    http_parser.rb (0.8.1)
+    i18n (1.14.8)
       concurrent-ruby (~> 1.0)
     jekyll (4.4.1)
       addressable (~> 2.4)
@@ -87,77 +53,32 @@ GEM
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.4)
-    listen (3.9.0)
+    listen (3.10.0)
+      logger
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     logger (1.7.0)
     mercenary (0.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (7.0.0)
+    public_suffix (7.0.2)
     rake (13.3.1)
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
     rexml (3.4.4)
-    rouge (4.6.1)
+    rouge (4.7.0)
     safe_yaml (1.0.5)
-    sass-embedded (1.96.0)
+    sass-embedded (1.97.2)
       google-protobuf (~> 4.31)
       rake (>= 13)
-    sass-embedded (1.96.0-aarch64-linux-android)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-aarch64-linux-gnu)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-aarch64-linux-musl)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-arm-linux-androideabi)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-arm-linux-gnueabihf)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-arm-linux-musleabihf)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-arm64-darwin)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-riscv64-linux-android)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-riscv64-linux-gnu)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-riscv64-linux-musl)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-x86_64-darwin)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-x86_64-linux-android)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-x86_64-linux-gnu)
-      google-protobuf (~> 4.31)
-    sass-embedded (1.96.0-x86_64-linux-musl)
-      google-protobuf (~> 4.31)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.6.0)
     webrick (1.9.2)
 
 PLATFORMS
-  aarch64-linux-android
-  aarch64-linux-gnu
-  aarch64-linux-musl
-  arm-linux-androideabi
-  arm-linux-gnu
-  arm-linux-gnueabihf
-  arm-linux-musl
-  arm-linux-musleabihf
-  arm64-darwin
-  riscv64-linux-android
-  riscv64-linux-gnu
-  riscv64-linux-musl
   ruby
-  x86-linux-gnu
-  x86-linux-musl
-  x86_64-darwin
-  x86_64-linux-android
-  x86_64-linux-gnu
-  x86_64-linux-musl
 
 DEPENDENCIES
   base64
@@ -169,4 +90,4 @@ DEPENDENCIES
   webrick
 
 BUNDLED WITH
-   2.7.1
+  4.0.3