diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 00000000..d10f97e6
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,19 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: daily
+  - package-ecosystem: bundler
+    directory: /
+    schedule:
+      interval: weekly
+  - package-ecosystem: docker
+    directory: docker
+    schedule:
+      interval: weekly
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index bd1daabc..fb8a4213 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,7 +23,7 @@ jobs:
     steps:
       - id: get_version
         name: Get package version
-        uses: actions/github-script@v3
+        uses: actions/github-script@v4.1
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           result-encoding: string
@@ -41,7 +41,7 @@ jobs:
 
       - id: get_url
         name: Get release upload url
-        uses: actions/github-script@v3
+        uses: actions/github-script@v4.1
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           result-encoding: string
@@ -65,7 +65,7 @@ jobs:
 
       - id: get_ref
         name: Get checkout ref for custom build scripts
-        uses: actions/github-script@v3
+        uses: actions/github-script@v4.1
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           result-encoding: string
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fdd64aca..b3d3df8a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,10 +18,13 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies 
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -45,10 +48,13 @@ jobs:
         yes | gem uninstall bundler --all
         gem install bundler -v "${{ matrix.bundler }}"
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -74,10 +80,22 @@ jobs:
         ghc-version: ${{ matrix.ghc }}
         cabal-version: ${{ matrix.cabal }}
     - run: bundle lock
-    - uses: actions/cache@v1
+    - name: cache cabal dependencies
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.cabal/packages
+          ~/.cabal/store
+        key: ${{ runner.os }}-cabal-${{ matrix.ghc }}-${{ hashFiles('**/app.cabal') }}
+        restore-keys: |
+          ${{ runner.os }}-cabal-
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -93,7 +111,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Setup php
-      uses: nanasess/setup-php@v3.0.6
+      uses: nanasess/setup-php@v3.0.8
       with:
         php-version: ${{ matrix.php }}
     - name: Set up Ruby
@@ -101,10 +119,13 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -126,10 +147,13 @@ jobs:
     - name: Set up Bundler
       run: gem install bundler
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
         key: ${{ runner.os }}-gem-${{ matrix.ruby }}-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-${{ matrix.ruby }}-
     - name: Bootstrap
       run: script/bootstrap
     - name: Build and lint
@@ -142,7 +166,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Setup go
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v2
       with:
         go-version: 1.10.x
     - name: Set up Ruby
@@ -150,10 +174,13 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -169,7 +196,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Setup go
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v2
       with:
         go-version: ${{ matrix.go }}
     - name: Set up Ruby
@@ -177,10 +204,22 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache go dependencies
+      with:
+        path: |
+         ~/.cache/go-build
+         ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go-
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -211,10 +250,22 @@ jobs:
       with:
         java-version: ${{ matrix.java }}
         distribution: adopt
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gradle dependencies
+      with:
+        path: |
+          ~/.gradle/caches
+          ~/.gradle/wrapper
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Gradle version
@@ -231,10 +282,13 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Run tests
@@ -248,7 +302,7 @@ jobs:
         elixir: [ 1.11.x, 1.12.x ]
     steps:
     - uses: actions/checkout@v2
-    - uses: erlef/setup-elixir@v1.6.0
+    - uses: erlef/setup-elixir@v1.9
       with:
         otp-version: ${{matrix.otp}}
         elixir-version: ${{matrix.elixir}}
@@ -257,10 +311,13 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -284,10 +341,13 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -311,10 +371,13 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -330,7 +393,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Setup python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python }}
         architecture: x64
@@ -339,10 +402,20 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache pip dependencies
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Install virtualenv
@@ -357,7 +430,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Setup python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
       with:
         python-version: '3.x'
         architecture: x64
@@ -366,10 +439,13 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Install pipenv
@@ -395,10 +471,20 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache spm dependencies
+      with:
+        path: .build
+        key: ${{ runner.os }}-spm-${{ hashFiles('**/Package.resolved') }}
+        restore-keys: |
+          ${{ runner.os }}-spm-
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
@@ -427,10 +513,13 @@ jobs:
       with:
         ruby-version: 2.6
     - run: bundle lock
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
+      name: cache gem dependencies
       with:
         path: vendor/gems
-        key: ${{ runner.os }}-gem-2.6.x-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gem-2.6-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gem-2.6-
     - name: Bootstrap
       run: script/bootstrap
     - name: Set up fixtures
diff --git a/docker/Dockerfile.build-linux b/docker/Dockerfile.build-linux
index 96fa79f3..7a970f29 100644
--- a/docker/Dockerfile.build-linux
+++ b/docker/Dockerfile.build-linux
@@ -1,4 +1,4 @@
-FROM ruby:2.4-slim-stretch
+FROM ruby:2.6.8-slim-stretch
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends cmake make gcc pkg-config squashfs-tools git curl bison rsync \
diff --git a/licensed.gemspec b/licensed.gemspec
index 5810e19e..0a3b5a90 100644
--- a/licensed.gemspec
+++ b/licensed.gemspec
@@ -26,16 +26,16 @@ Gem::Specification.new do |spec|
   spec.add_dependency "licensee", ">= 9.14.0", "< 10.0.0"
   spec.add_dependency "thor", ">= 0.19"
   spec.add_dependency "pathname-common_prefix", "~> 0.0.1"
-  spec.add_dependency "tomlrb", "~> 1.2"
+  spec.add_dependency "tomlrb", ">= 1.2", "< 3.0"
   spec.add_dependency "bundler", ">= 1.10"
   spec.add_dependency "ruby-xxHash", "~> 0.4"
   spec.add_dependency "parallel", ">= 0.18.0"
-  spec.add_dependency "reverse_markdown", "~> 1.0"
+  spec.add_dependency "reverse_markdown", ">= 1", "< 3"
 
   spec.add_development_dependency "rake", ">= 12.3.3"
   spec.add_development_dependency "minitest", "~> 5.8"
   spec.add_development_dependency "mocha", "~> 1.0"
   spec.add_development_dependency "rubocop", "~> 0.49", "< 0.67"
   spec.add_development_dependency "rubocop-github", "~> 0.6"
-  spec.add_development_dependency "byebug", "~> 10.0.0"
+  spec.add_development_dependency "byebug", "~> 11.0.1"
 end