diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 322a2b6ea8..4f8ed6f248 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -13,3 +13,8 @@ updates:
       github-actions:
         patterns:
           - "*"
+
+  - package-ecosystem: docker
+    directory: /tests/docker
+    schedule:
+      interval: daily
diff --git a/.github/workflows/ci-mingw.yml b/.github/workflows/ci-mingw.yml
index 8c27a8ac7e..ab9fb104a9 100644
--- a/.github/workflows/ci-mingw.yml
+++ b/.github/workflows/ci-mingw.yml
@@ -29,7 +29,7 @@ jobs:
         shell: msys2 {0}
     steps:
     - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-    - uses: msys2/setup-msys2@v2
+    - uses: msys2/setup-msys2@76b1bed68bac51ebe46cb431077217d4b98e2b7b # v2.21.0
       with:
         msystem: ${{ matrix.sys }}
         update: true
diff --git a/.github/workflows/cifuzz.yml b/.github/workflows/cifuzz.yml
index 6e2d355a48..1706c9b915 100644
--- a/.github/workflows/cifuzz.yml
+++ b/.github/workflows/cifuzz.yml
@@ -21,12 +21,12 @@ jobs:
     steps:
     - name: Build Fuzzers
       id: build
-      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@c836f141decccfaa27ef54cd5959faeec3f32bd7 # master
       with:
         oss-fuzz-project-name: 'libavif'
         dry-run: false
     - name: Run Fuzzers
-      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@c836f141decccfaa27ef54cd5959faeec3f32bd7 # master
       with:
         oss-fuzz-project-name: 'libavif'
         fuzz-seconds: 600
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000000..8038c10aa3
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,78 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: ["main"]
+  schedule:
+    - cron: "0 0 * * 1"
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ["cpp", "java", "python"]
+        # CodeQL supports [ $supported-codeql-languages ]
+        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@eb238b55efaa70779f274895e782ed17c84f2895 # v2.6.1
+        with:
+          egress-policy: audit
+
+      - name: Checkout repository
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@03e7845b7bfcd5e7fb63d1ae8c61b0e791134fab # v2.22.11
+        with:
+          languages: ${{ matrix.language }}
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
+
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@03e7845b7bfcd5e7fb63d1ae8c61b0e791134fab # v2.22.11
+
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+      #   If the Autobuild fails above, remove it and uncomment the following three lines.
+      #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+
+      # - run: |
+      #   echo "Run, Build Application using script"
+      #   ./location_of_script_within_repo/buildscript.sh
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@03e7845b7bfcd5e7fb63d1ae8c61b0e791134fab # v2.22.11
+        with:
+          category: "/language:${{matrix.language}}"
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
new file mode 100644
index 0000000000..fd27e55b6e
--- /dev/null
+++ b/.github/workflows/dependency-review.yml
@@ -0,0 +1,27 @@
+# Dependency Review Action
+#
+# This Action will scan dependency manifest files that change as part of a Pull Request,
+# surfacing known-vulnerable versions of the packages declared or updated in the PR.
+# Once installed, if the workflow run is marked as required,
+# PRs introducing known-vulnerable packages will be blocked from merging.
+#
+# Source repository: https://github.com/actions/dependency-review-action
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@eb238b55efaa70779f274895e782ed17c84f2895 # v2.6.1
+        with:
+          egress-policy: audit
+
+      - name: 'Checkout Repository'
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@0efb1d1d84fc9633afcdaad14c485cbbc90ef46c # v2.5.1