diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 0ae15c491..054a81eb0 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -10,13 +10,17 @@ on:
 jobs:
   check:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
+        with:
+          persist-credentials: false
       - name: Set up the JDK
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@17f84c3641ba7b8f6deff6309fc4c864478f5d62 # v3
         with:
           java-version: '17'
           distribution: 'temurin'
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3
       - run: ./gradlew checkWithCodenarc checkstyleMain checkstyleTest runUnitTests runLiveObjectUnitTests
diff --git a/.github/workflows/emulate.yml b/.github/workflows/emulate.yml
index eca63a3eb..a95d1386c 100644
--- a/.github/workflows/emulate.yml
+++ b/.github/workflows/emulate.yml
@@ -9,6 +9,8 @@ on:
 jobs:
   check:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     strategy:
       fail-fast: false
       matrix:
@@ -16,16 +18,18 @@ jobs:
 
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        with:
+          persist-credentials: false
 
       - name: Set up the JDK
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@17f84c3641ba7b8f6deff6309fc4c864478f5d62 # v3
         with:
           java-version: '17'
           distribution: 'temurin'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@0723195856401067f7a2779048b490ace7a47d7c # v5
         timeout-minutes: 5
 
       # API 30+ emulators only have x86_64 system images.
@@ -38,7 +42,7 @@ jobs:
             sudo udevadm control --reload-rules
             sudo udevadm trigger --name-match=kvm
 
-      - uses: reactivecircus/android-emulator-runner@v2
+      - uses: reactivecircus/android-emulator-runner@e89f39f1abbbd05b1113a29cf4db69e7540cae5a # v2
         with:
           api-level: ${{ matrix.android-api-level }}
           emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
@@ -48,7 +52,7 @@ jobs:
           # Print emulator logs if tests fail
           script: ./gradlew :android:connectedAndroidTest ${{ matrix.android-api-level == 19 && '-PhttpURLConnection' || '' }} || (adb logcat -d System.out:I && exit 1)
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: always()
         with:
           name: android-build-reports-${{ matrix.android-api-level }}
diff --git a/.github/workflows/example-app.yml b/.github/workflows/example-app.yml
index 454594810..414ebe05d 100644
--- a/.github/workflows/example-app.yml
+++ b/.github/workflows/example-app.yml
@@ -9,6 +9,8 @@ on:
 jobs:
   check:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     strategy:
       fail-fast: false
       matrix:
@@ -16,16 +18,18 @@ jobs:
 
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        with:
+          persist-credentials: false
 
       - name: Set up the JDK
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@17f84c3641ba7b8f6deff6309fc4c864478f5d62 # v3
         with:
           java-version: '17'
           distribution: 'temurin'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3
 
       - name: Enable KVM
         run: |
@@ -33,7 +37,7 @@ jobs:
           sudo udevadm control --reload-rules
           sudo udevadm trigger --name-match=kvm
 
-      - uses: reactivecircus/android-emulator-runner@v2
+      - uses: reactivecircus/android-emulator-runner@e89f39f1abbbd05b1113a29cf4db69e7540cae5a # v2
         with:
           api-level: ${{ matrix.android-api-level }}
           emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
diff --git a/.github/workflows/features.yml b/.github/workflows/features.yml
index bf45ed810..804458d17 100644
--- a/.github/workflows/features.yml
+++ b/.github/workflows/features.yml
@@ -8,7 +8,12 @@ on:
 
 jobs:
   build:
-    uses: ably/features/.github/workflows/sdk-features.yml@main
+    permissions:
+      contents: read
+      id-token: write
+      deployments: write
+    uses: ably/features/.github/workflows/sdk-features.yml@6b3fc7a8ede2ebdd7a6325314f3a96c6466f1453 # main
     with:
       repository-name: ably-java
-    secrets: inherit
+    secrets:
+      ABLY_AWS_ACCOUNT_ID_SDK: ${{ secrets.ABLY_AWS_ACCOUNT_ID_SDK }}
diff --git a/.github/workflows/integration-test.yml b/.github/workflows/integration-test.yml
index 373926f2d..1c59f771a 100644
--- a/.github/workflows/integration-test.yml
+++ b/.github/workflows/integration-test.yml
@@ -10,23 +10,26 @@ on:
 jobs:
   check-rest-httpurlconnection:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           submodules: 'recursive'
+          persist-credentials: false
 
       - name: Set up the JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: '17'
           distribution: 'temurin'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3
 
       - run: ./gradlew :java:testRestSuite -PhttpURLConnection
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: always()
         with:
           name: java-build-reports-rest
@@ -34,77 +37,89 @@ jobs:
 
   check-realtime-httpurlconnection:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           submodules: 'recursive'
+          persist-credentials: false
 
       - name: Set up the JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: '17'
           distribution: 'temurin'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3
 
       - run: ./gradlew :java:testRealtimeSuite -PhttpURLConnection
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: always()
         with:
           name: java-build-reports-realtime
           path: java/build/reports/
   check-rest-okhttp:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           submodules: 'recursive'
+          persist-credentials: false
 
       - name: Set up the JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: '17'
           distribution: 'temurin'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3
 
       - run: ./gradlew :java:testRestSuite
 
   check-realtime-okhttp:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           submodules: 'recursive'
+          persist-credentials: false
 
       - name: Set up the JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: '17'
           distribution: 'temurin'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3
 
       - run: ./gradlew :java:testRealtimeSuite
 
   check-liveobjects:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           submodules: 'recursive'
+          persist-credentials: false
 
       - name: Set up the JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: '17'
           distribution: 'temurin'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3
 
       - run: ./gradlew runLiveObjectIntegrationTests
diff --git a/.github/workflows/javadoc.yml b/.github/workflows/javadoc.yml
index 504c014b4..8876dbb11 100644
--- a/.github/workflows/javadoc.yml
+++ b/.github/workflows/javadoc.yml
@@ -13,29 +13,31 @@ jobs:
       id-token: write
       deployments: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        with:
+          persist-credentials: false
 
       - name: Configure AWS Credentials
-        uses: aws-actions/configure-aws-credentials@v1
+        uses: aws-actions/configure-aws-credentials@67fbcbb121271f7775d2e7715933280b06314838 # v1
         with:
           aws-region: eu-west-2
           role-to-assume: arn:aws:iam::${{ secrets.ABLY_AWS_ACCOUNT_ID_SDK }}:role/ably-sdk-builds-ably-java
           role-session-name: "${{ github.run_id }}-${{ github.run_number }}"
 
       - name: Set up the JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: '17'
           distribution: 'temurin'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3
 
       - name: Build docs
         run: ./gradlew javadoc
 
       - name: Upload Documentation
-        uses: ably/sdk-upload-action@v2
+        uses: ably/sdk-upload-action@4e694297f208b72b5a9f6b1248a1556f19f821d6 # v2
         with:
           sourcePath: java/build/docs/javadoc
           githubToken: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 44a6814fe..c55cc27a9 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -7,9 +7,13 @@ jobs:
   run-on-release:
     runs-on: ubuntu-latest
     if: github.repository == 'ably/ably-java'
+    permissions:
+      contents: read
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        with:
+          persist-credentials: false
 
       - name: Extract tag
         id: tag
@@ -34,13 +38,13 @@ jobs:
           TAG: ${{ steps.tag.outputs.tag }}
 
       - name: Set up JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: 17
           distribution: temurin
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3
 
       - name: Publish and release to Maven Central
         run: ./gradlew publishAndReleaseToMavenCentral