diff --git a/.github/workflows/create_jira.yml b/.github/workflows/create_jira.yml
index 8180ac0f..7a57a049 100644
--- a/.github/workflows/create_jira.yml
+++ b/.github/workflows/create_jira.yml
@@ -8,13 +8,13 @@ on:
 jobs:
   create_jira:
     name: Create Jira Ticket
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
     environment: IssueTracker
     steps:
     - name: Checkout
-      uses: actions/checkout@master
+      uses: actions/checkout@61b9e3751b92087fd0b06925ba6dd6314e06f089  # master
     - name: Login
-      uses: atlassian/gajira-login@master
+      uses: atlassian/gajira-login@c22a5debd482401472b285de4f6deedf70ddbb92  # master
       env:
         JIRA_BASE_URL: ${{ secrets.JIRA_BASE_URL }}
         JIRA_USER_EMAIL: ${{ secrets.JIRA_USER_EMAIL }}
@@ -24,7 +24,7 @@ jobs:
 
     - name: Create
       id: create
-      uses: atlassian/gajira-create@master
+      uses: atlassian/gajira-create@1c54357fdde9dab6273a0e26d67cb175ffffe498  # master
       with:
         project: ${{ secrets.JIRA_PROJECT }}
         issuetype: Bug
diff --git a/.github/workflows/e2e-tests.yml b/.github/workflows/e2e-tests.yml
index 3103746c..5281014c 100644
--- a/.github/workflows/e2e-tests.yml
+++ b/.github/workflows/e2e-tests.yml
@@ -29,12 +29,12 @@ jobs:
 
     steps:
       - name: Checkout SDK
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
         with:
           path: sdk
 
       - name: Checkout sdk-e2e-tests
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
         with:
           repository: segmentio/sdk-e2e-tests
           ref: ${{ inputs.e2e_tests_ref || 'main' }}
@@ -42,7 +42,7 @@ jobs:
           path: sdk-e2e-tests
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020  # v4
         with:
           node-version: '20'
 
@@ -66,7 +66,7 @@ jobs:
 
       - name: Upload test results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02  # v4
         with:
           name: e2e-test-results
           path: sdk-e2e-tests/test-results/
diff --git a/.github/workflows/publish-e2e-cli.yml b/.github/workflows/publish-e2e-cli.yml
index cac6666f..69a65dfe 100644
--- a/.github/workflows/publish-e2e-cli.yml
+++ b/.github/workflows/publish-e2e-cli.yml
@@ -22,14 +22,14 @@ jobs:
     runs-on: macos-latest
     steps:
       - name: Checkout SDK
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
 
       - name: Build e2e-cli (release)
         working-directory: e2e-cli
         run: swift build -c release
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02  # v4
         with:
           name: e2e-cli
           path: e2e-cli/.build/release/E2ECLI
diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index e2c93ffd..9959a7ea 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -8,9 +8,9 @@ on:
 
 jobs:
   cancel_previous:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
     steps:
-      - uses: styfle/cancel-workflow-action@0.12.0
+      - uses: styfle/cancel-workflow-action@01ce38bf961b4e243a6342cbade0dbc8ba3f0432  # 0.12.0
         with:
           workflow_id: ${{ github.event.workflow.id }}
 
@@ -18,11 +18,11 @@ jobs:
     needs: cancel_previous
     runs-on: macos-26
     steps:
-      - uses: maxim-lobanov/setup-xcode@v1
+      - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90  # v1
         with:
           xcode-version: "26"
-      - uses: actions/checkout@v2
-      - uses: webfactory/ssh-agent@v0.8.0
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5  # v2
+      - uses: webfactory/ssh-agent@d4b9b8ff72958532804b70bbe600ad43b36d5f2e  # v0.8.0
         with:
           ssh-private-key: ${{ secrets.SOVRAN_SSH_KEY }}
       - name: Build & Run tests
@@ -30,7 +30,7 @@ jobs:
       - name: Convert coverage report
         run: xcrun llvm-cov export -format="lcov" .build/debug/SegmentPackageTests.xctest/Contents/MacOS/SegmentPackageTests -instr-profile .build/debug/codecov/default.profdata > coverage.lcov
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v4.0.1
+        uses: codecov/codecov-action@e0b68c6749509c5f83f984dd99a76a1c1a231044  # v4.0.1
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           slug: segmentio/analytics-swift
@@ -39,11 +39,11 @@ jobs:
     needs: cancel_previous
     runs-on: macos-26
     steps:
-      - uses: maxim-lobanov/setup-xcode@v1
+      - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90  # v1
         with:
           xcode-version: "26"
-      - uses: actions/checkout@v2
-      - uses: webfactory/ssh-agent@v0.8.0
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5  # v2
+      - uses: webfactory/ssh-agent@d4b9b8ff72958532804b70bbe600ad43b36d5f2e  # v0.8.0
         with:
           ssh-private-key: ${{ secrets.SOVRAN_SSH_KEY }}
       - name: Build & Run tests
@@ -53,11 +53,11 @@ jobs:
     needs: cancel_previous
     runs-on: macos-26
     steps:
-      - uses: maxim-lobanov/setup-xcode@v1
+      - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90  # v1
         with:
           xcode-version: "26"
-      - uses: actions/checkout@v2
-      - uses: webfactory/ssh-agent@v0.8.0
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5  # v2
+      - uses: webfactory/ssh-agent@d4b9b8ff72958532804b70bbe600ad43b36d5f2e  # v0.8.0
         with:
           ssh-private-key: ${{ secrets.SOVRAN_SSH_KEY }}
       - run: xcodebuild -scheme Segment test -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 17'
@@ -66,11 +66,11 @@ jobs:
     needs: cancel_previous
     runs-on: macos-26
     steps:
-      - uses: maxim-lobanov/setup-xcode@v1
+      - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90  # v1
         with:
           xcode-version: "26"
-      - uses: actions/checkout@v2
-      - uses: webfactory/ssh-agent@v0.8.0
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5  # v2
+      - uses: webfactory/ssh-agent@d4b9b8ff72958532804b70bbe600ad43b36d5f2e  # v0.8.0
         with:
           ssh-private-key: ${{ secrets.SOVRAN_SSH_KEY }}
       - run: xcodebuild -scheme Segment test -sdk appletvsimulator -destination 'platform=tvOS Simulator,name=Apple TV'
@@ -79,11 +79,11 @@ jobs:
     needs: cancel_previous
     runs-on: macos-26
     steps:
-      - uses: maxim-lobanov/setup-xcode@v1
+      - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90  # v1
         with:
           xcode-version: "26"
-      - uses: actions/checkout@v2
-      - uses: webfactory/ssh-agent@v0.8.0
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5  # v2
+      - uses: webfactory/ssh-agent@d4b9b8ff72958532804b70bbe600ad43b36d5f2e  # v0.8.0
         with:
           ssh-private-key: ${{ secrets.SOVRAN_SSH_KEY }}
       - run: xcodebuild -scheme Segment test -sdk watchsimulator -destination 'platform=watchOS Simulator,name=Apple Watch Ultra 3 (49mm)'
@@ -92,11 +92,11 @@ jobs:
     needs: cancel_previous
     runs-on: macos-26
     steps:
-      - uses: maxim-lobanov/setup-xcode@v1
+      - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90  # v1
         with:
           xcode-version: "26"
-      - uses: actions/checkout@v2
-      - uses: webfactory/ssh-agent@v0.8.0
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5  # v2
+      - uses: webfactory/ssh-agent@d4b9b8ff72958532804b70bbe600ad43b36d5f2e  # v0.8.0
         with:
           ssh-private-key: ${{ secrets.SOVRAN_SSH_KEY }}
       - run: xcodebuild -scheme Segment test -destination 'platform=visionOS Simulator,OS=latest,name=Apple Vision Pro'
@@ -105,11 +105,11 @@ jobs:
     needs: cancel_previous
     runs-on: macos-26
     steps:
-      - uses: maxim-lobanov/setup-xcode@v1
+      - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90  # v1
         with:
           xcode-version: "26"
-      - uses: actions/checkout@v2
-      - uses: webfactory/ssh-agent@v0.8.0
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5  # v2
+      - uses: webfactory/ssh-agent@d4b9b8ff72958532804b70bbe600ad43b36d5f2e  # v0.8.0
         with:
           ssh-private-key: ${{ secrets.SOVRAN_SSH_KEY }}
       - name: build for ios simulator