diff --git a/.github/workflows/build_batch_release.yml b/.github/workflows/build_batch_release.yml
index ff584e14d..9e8ed0776 100644
--- a/.github/workflows/build_batch_release.yml
+++ b/.github/workflows/build_batch_release.yml
@@ -9,11 +9,11 @@ jobs:
     name: Build gems
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 3.3
+        ruby-version: 3.4
     - name: Build gem source
       run:  ruby .scripts/batch_build.rb
     - name: Archive Artifacts
diff --git a/.github/workflows/build_release.yml b/.github/workflows/build_release.yml
index 3dfe24f81..ac02f9a3e 100644
--- a/.github/workflows/build_release.yml
+++ b/.github/workflows/build_release.yml
@@ -9,12 +9,12 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-node@v1
+    - uses: actions/checkout@v4
+    - uses: actions/setup-node@v4
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.7
+        ruby-version: 3.4
     - name: Capture sdk name
       uses: actions-ecosystem/action-regex-match@v2
       id: regex-match
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index bd6958c10..a3cd6b1ab 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -42,7 +42,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 43180011d..5a0a66f0b 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -6,11 +6,11 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.3"
+          ruby-version: "3.4"
           bundler-cache: true
       - name: Run rubocop
         run: bundle exec rubocop
diff --git a/.github/workflows/prepare_batch_release.yml b/.github/workflows/prepare_batch_release.yml
index 987f2132e..4fbdce88a 100644
--- a/.github/workflows/prepare_batch_release.yml
+++ b/.github/workflows/prepare_batch_release.yml
@@ -19,7 +19,7 @@ jobs:
         with:
           app-id: ${{ vars.SENTRY_RELEASE_BOT_CLIENT_ID }}
           private-key: ${{ secrets.SENTRY_RELEASE_BOT_PRIVATE_KEY }}
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           token: ${{ steps.token.outputs.token }}
           fetch-depth: 0
diff --git a/.github/workflows/prepare_raven_release.yml b/.github/workflows/prepare_raven_release.yml
index 39dd4301a..871401fcf 100644
--- a/.github/workflows/prepare_raven_release.yml
+++ b/.github/workflows/prepare_raven_release.yml
@@ -19,7 +19,7 @@ jobs:
         with:
           app-id: ${{ vars.SENTRY_RELEASE_BOT_CLIENT_ID }}
           private-key: ${{ secrets.SENTRY_RELEASE_BOT_PRIVATE_KEY }}
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           token: ${{ steps.token.outputs.token }}
           fetch-depth: 0
diff --git a/.github/workflows/sentry_delayed_job_test.yml b/.github/workflows/sentry_delayed_job_test.yml
index cc8d52f4e..d162c5cd4 100644
--- a/.github/workflows/sentry_delayed_job_test.yml
+++ b/.github/workflows/sentry_delayed_job_test.yml
@@ -49,7 +49,7 @@ jobs:
           - { ruby_version: "head" }
           - { ruby_version: 'jruby-head' }
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - name: Install sqlite
         run: |
           # See https://github.community/t5/GitHub-Actions/ubuntu-latest-Apt-repository-list-issues/td-p/41122/page/2
@@ -68,6 +68,6 @@ jobs:
 
       - name: Upload Coverage
         if: ${{ matrix.options.codecov }}
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.github/workflows/sentry_opentelemetry_test.yml b/.github/workflows/sentry_opentelemetry_test.yml
index 913afadc0..fbe31e222 100644
--- a/.github/workflows/sentry_opentelemetry_test.yml
+++ b/.github/workflows/sentry_opentelemetry_test.yml
@@ -46,7 +46,7 @@ jobs:
         exclude:
           - { ruby_version: 'jruby-head' }
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
 
       - name: Set up Ruby ${{ matrix.ruby_version }}
         uses: ruby/setup-ruby@v1
@@ -58,6 +58,6 @@ jobs:
         run: bundle exec rake
 
       - name: Upload Coverage
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.github/workflows/sentry_rails_test.yml b/.github/workflows/sentry_rails_test.yml
index b52abde8a..4573aae36 100644
--- a/.github/workflows/sentry_rails_test.yml
+++ b/.github/workflows/sentry_rails_test.yml
@@ -51,8 +51,10 @@ jobs:
           - { ruby_version: "3.1", rails_version: 7.2.0 }
           - { ruby_version: "3.2", rails_version: 7.2.0 }
           - { ruby_version: "3.3", rails_version: 7.2.0 }
+          - { ruby_version: "3.4", rails_version: 7.2.0 }
           - { ruby_version: "3.2", rails_version: "8.0.0" }
           - { ruby_version: "3.3", rails_version: "8.0.0" }
+          - { ruby_version: "3.4", rails_version: "8.0.0" }
           - { ruby_version: "jruby", rails_version: 6.1.0 }
           - {
               ruby_version: "3.2",
@@ -67,7 +69,7 @@ jobs:
               rails_version: 7.1.0
             }
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - name: Install sqlite and ImageMagick
         run: |
           # See https://github.community/t5/GitHub-Actions/ubuntu-latest-Apt-repository-list-issues/td-p/41122/page/2
@@ -84,6 +86,6 @@ jobs:
         run: bundle exec rake
 
       - name: Upload Coverage
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.github/workflows/sentry_raven_test.yml b/.github/workflows/sentry_raven_test.yml
index c1732dd85..4e120cb24 100644
--- a/.github/workflows/sentry_raven_test.yml
+++ b/.github/workflows/sentry_raven_test.yml
@@ -48,7 +48,7 @@ jobs:
             rails_version: 6.0.0
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
 
       - name: Set up Ruby ${{ matrix.ruby_version }}
         uses: ruby/setup-ruby@v1
diff --git a/.github/workflows/sentry_resque_test.yml b/.github/workflows/sentry_resque_test.yml
index d03411138..861187baa 100644
--- a/.github/workflows/sentry_resque_test.yml
+++ b/.github/workflows/sentry_resque_test.yml
@@ -44,7 +44,7 @@ jobs:
         exclude:
           - { ruby_version: 'jruby-head' }
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - name: Set up Ruby ${{ matrix.ruby_version }}
         uses: ruby/setup-ruby@v1
         with:
@@ -67,6 +67,6 @@ jobs:
         run: bundle exec rake
 
       - name: Upload Coverage
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.github/workflows/sentry_ruby_test.yml b/.github/workflows/sentry_ruby_test.yml
index 2a1c9614e..b2b90e2a6 100644
--- a/.github/workflows/sentry_ruby_test.yml
+++ b/.github/workflows/sentry_ruby_test.yml
@@ -59,10 +59,15 @@ jobs:
               rack_version: 3.1,
               redis_rb_version: 5.3
             }
+          - {
+              ruby_version: 3.4,
+              rack_version: 3.1,
+              redis_rb_version: 5.3
+            }
         exclude:
           - { ruby_version: 'jruby-head' }
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
 
       - name: Set up Ruby ${{ matrix.ruby_version }}
         uses: ruby/setup-ruby@v1
@@ -79,6 +84,6 @@ jobs:
         run: bundle exec rake
 
       - name: Upload Coverage
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.github/workflows/sentry_sidekiq_test.yml b/.github/workflows/sentry_sidekiq_test.yml
index 7b7768069..9ef84ff1a 100644
--- a/.github/workflows/sentry_sidekiq_test.yml
+++ b/.github/workflows/sentry_sidekiq_test.yml
@@ -28,7 +28,7 @@ jobs:
       fail-fast: false
       matrix:
         sidekiq_version: ["5.0", "6.5", "7.0"]
-        ruby_version: ["2.7", "3.0", "3.1", "3.2", "3.3", jruby]
+        ruby_version: ["2.7", "3.0", "3.1", "3.2", "3.3", "3.4", jruby]
         include:
           - { ruby_version: 2.4, sidekiq_version: 5.0 }
           - { ruby_version: 2.5, sidekiq_version: 5.0 }
@@ -46,12 +46,11 @@ jobs:
                   rubyopt: "--enable-frozen-string-literal --debug=frozen-string-literal",
                 },
             }
-          - {
-              ruby_version: "3.2",
-              sidekiq_version: 7.0
-            }
+          - { ruby_version: "3.2", sidekiq_version: 7.0 }
+          - { ruby_version: "3.3", sidekiq_version: 7.0 }
+          - { ruby_version: "3.4", sidekiq_version: 7.0 }
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
 
       - name: Set up Ruby ${{ matrix.ruby_version }}
         uses: ruby/setup-ruby@v1
@@ -70,6 +69,6 @@ jobs:
         run: bundle exec rake
 
       - name: Upload Coverage
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cd18e7413..6b5df7420 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,11 +3,18 @@
 ### Features
 
 - Improve the accuracy of duration calculations in cron jobs monitoring ([#2471](https://github.com/getsentry/sentry-ruby/pull/2471))
+- Support `code.namespace` for Ruby 3.4+ stacktraces ([#2506](https://github.com/getsentry/sentry-ruby/pull/2506))
+
 
 ### Bug fixes
 
 - Default to `internal_error` error type for OpenTelemetry spans [#2473](https://github.com/getsentry/sentry-ruby/pull/2473)
 
+### Internal
+
+- Test Ruby 3.4 in CI ([#2506](https://github.com/getsentry/sentry-ruby/pull/2506))
+- Upgrade actions workflows versions ([#2506](https://github.com/getsentry/sentry-ruby/pull/2506))
+
 ## 5.22.1
 
 ### Bug Fixes
diff --git a/sentry-rails/lib/sentry/rails/backtrace_cleaner.rb b/sentry-rails/lib/sentry/rails/backtrace_cleaner.rb
index 3400df7e0..ce32173a0 100644
--- a/sentry-rails/lib/sentry/rails/backtrace_cleaner.rb
+++ b/sentry-rails/lib/sentry/rails/backtrace_cleaner.rb
@@ -7,7 +7,7 @@ module Sentry
   module Rails
     class BacktraceCleaner < ActiveSupport::BacktraceCleaner
       APP_DIRS_PATTERN = /\A(?:\.\/)?(?:app|config|lib|test|\(\w*\))/
-      RENDER_TEMPLATE_PATTERN = /:in `.*_\w+_{2,3}\d+_\d+'/
+      RENDER_TEMPLATE_PATTERN = /:in (?:`|').*_\w+_{2,3}\d+_\d+'/
 
       def initialize
         super
diff --git a/sentry-rails/lib/sentry/rails/tracing/active_record_subscriber.rb b/sentry-rails/lib/sentry/rails/tracing/active_record_subscriber.rb
index 480e7011a..09468b6cc 100644
--- a/sentry-rails/lib/sentry/rails/tracing/active_record_subscriber.rb
+++ b/sentry-rails/lib/sentry/rails/tracing/active_record_subscriber.rb
@@ -71,6 +71,7 @@ def subscribe!
 
                 if source_location
                   backtrace_line = Sentry::Backtrace::Line.parse(source_location)
+
                   span.set_data(Span::DataConventions::FILEPATH, backtrace_line.file) if backtrace_line.file
                   span.set_data(Span::DataConventions::LINENO, backtrace_line.number) if backtrace_line.number
                   span.set_data(Span::DataConventions::FUNCTION, backtrace_line.method) if backtrace_line.method
diff --git a/sentry-rails/spec/sentry/rails/tracing/active_record_subscriber_spec.rb b/sentry-rails/spec/sentry/rails/tracing/active_record_subscriber_spec.rb
index 2441a63d3..be674869f 100644
--- a/sentry-rails/spec/sentry/rails/tracing/active_record_subscriber_spec.rb
+++ b/sentry-rails/spec/sentry/rails/tracing/active_record_subscriber_spec.rb
@@ -51,6 +51,7 @@ def foo
         Post.all.to_a
       end
       query_line = __LINE__ - 2
+      rspec_class = self.name # RSpec::ExampleGroups::[....]
 
       before do
         transaction = Sentry::Transaction.new(sampled: true, hub: Sentry.get_current_hub)
@@ -94,6 +95,7 @@ def foo
           data = span[:data]
           expect(data["code.filepath"]).to eq(__FILE__)
           expect(data["code.lineno"]).to eq(query_line)
+          expect(data["code.namespace"]).to eq(rspec_class) if RUBY_VERSION.to_f >= 3.4
           expect(data["code.function"]).to eq("foo")
         end
       end
diff --git a/sentry-ruby/lib/sentry/backtrace.rb b/sentry-ruby/lib/sentry/backtrace.rb
index 5fd2aadff..7c17adfec 100644
--- a/sentry-ruby/lib/sentry/backtrace.rb
+++ b/sentry-ruby/lib/sentry/backtrace.rb
@@ -12,7 +12,7 @@ class Line
       RUBY_INPUT_FORMAT = /
         ^ \s* (?: [a-zA-Z]: | uri:classloader: )? ([^:]+ | <.*>):
         (\d+)
-        (?: :in\s('|`)([^']+)')?$
+        (?: :in\s('|`)(?:([\w:]+)\#)?([^']+)')?$
       /x
 
       # org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:170)
@@ -37,10 +37,11 @@ class Line
       # @return [Line] The parsed backtrace line
       def self.parse(unparsed_line, in_app_pattern = nil)
         ruby_match = unparsed_line.match(RUBY_INPUT_FORMAT)
+
         if ruby_match
-          _, file, number, _, method = ruby_match.to_a
+          _, file, number, _, module_name, method = ruby_match.to_a
           file.sub!(/\.class$/, RB_EXTENSION)
-          module_name = nil
+          module_name = module_name
         else
           java_match = unparsed_line.match(JAVA_INPUT_FORMAT)
           _, module_name, method, file, number = java_match.to_a