diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9c4ee29..8a38c06 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,7 +50,7 @@ jobs:
       - name: Build a Node application through the shared Mise pipeline
         uses: dagger/dagger-for-github@27b130bf0f79a7f6fbbbe0fbca6760dc9bb40a77 # v8.4.1
         with:
-          version: "0.21.8"
+          version: "0.21.9"
           dagger-flags: --silent
           verb: run
           args: >-
@@ -63,7 +63,7 @@ jobs:
       - name: Build through the Mise-powered Rails pipeline
         uses: dagger/dagger-for-github@27b130bf0f79a7f6fbbbe0fbca6760dc9bb40a77 # v8.4.1
         with:
-          version: "0.21.8"
+          version: "0.21.9"
           dagger-flags: --silent
           verb: run
           args: >-
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b240e8d..87af991 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 0.1.0.alpha.7 - 2026-10-02
+
+- Require Dagger Ruby 0.11.1 or newer for startup status and Dagger 0.21.9 support.
+- Update development dependencies.
+
 ## 0.1.0.alpha.6 - 2026-08-28
 
 - Run `bin/rails boring:build` as a standalone builder process so Dagger can
diff --git a/Gemfile b/Gemfile
index db8284b..e4d61f2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,12 +9,12 @@ gemspec
 group :development do
   gem "bundler-audit", "~> 0.9"
   gem "rake", "~> 13.4"
-  gem "rubocop", "~> 1.90"
-  gem "rubocop-minitest", "~> 0.40"
+  gem "rubocop", "~> 1.91"
+  gem "rubocop-minitest", "~> 0.41"
   gem "rubocop-rake", "~> 0.7"
 end
 
 group :test do
   gem "minitest", "~> 6.0"
-  gem "simplecov", "~> 1.2"
+  gem "simplecov", "~> 1.2.0"
 end
diff --git a/boringbuilder.gemspec b/boringbuilder.gemspec
index 763faff..bebefb2 100644
--- a/boringbuilder.gemspec
+++ b/boringbuilder.gemspec
@@ -40,5 +40,5 @@ Gem::Specification.new do |spec|
   spec.executables = ["boringbuilder"]
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "dagger_ruby", "~> 0.11"
+  spec.add_dependency "dagger_ruby", "~> 0.11", ">= 0.11.1"
 end
diff --git a/lib/boringbuilder/version.rb b/lib/boringbuilder/version.rb
index 9ad865a..92f51b1 100644
--- a/lib/boringbuilder/version.rb
+++ b/lib/boringbuilder/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module BoringBuilder
-  VERSION = "0.1.0.alpha.6"
+  VERSION = "0.1.0.alpha.7"
 end
diff --git a/mise.toml b/mise.toml
index 8cf9d22..376386d 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,6 +1,6 @@
 [tools]
 ruby = "4.0.6"
-dagger = "0.21.8"
+dagger = "0.21.9"
 
 [tasks.setup]
 description = "Install gem dependencies"