diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index a63e9bb2..edbc52f5 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -21,7 +21,7 @@ jobs:
           echo "can_add_commit=${{ secrets.PR_AUTOMATION_BOT_PUBLIC_PRIVATE_KEY != '' && github.event_name == 'pull_request' }}" >> $GITHUB_OUTPUT
 
       - name: Create GitHub App Token
-        uses: actions/create-github-app-token@v1
+        uses: actions/create-github-app-token@d72941d797fd3113feb6b93fd0dec494b13a2547 # v1.12.0
         id: app-token
         if: steps.check_can_add_commit.outputs.can_add_commit == 'true'
         with:
@@ -30,14 +30,14 @@ jobs:
 
       - name: Checkout
         if: steps.check_can_add_commit.outputs.can_add_commit == 'true'
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
         with:
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           ref: ${{ github.event.pull_request.head.ref }}
           token: ${{ steps.app-token.outputs.token }}
       - name: Checkout
         if: steps.check_can_add_commit.outputs.can_add_commit == 'false'
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Install shfmt
         run: sudo snap install --classic shfmt
@@ -56,7 +56,7 @@ jobs:
           fi
       - name: Commit Formatting changes
         if: steps.check_can_add_commit.outputs.can_add_commit == 'true' && steps.check_format.outputs.formatting_needed == 'true'
-        uses: EndBug/add-and-commit@v9.1.4
+        uses: EndBug/add-and-commit@a94899bca583c204427a224a7af87c02f9b325d5 # v9.1.4
         with:
           add: .
           default_author: github_actions
@@ -77,9 +77,9 @@ jobs:
     steps:
       - name: Install apt-dependencies
         run: sudo apt-get update && sudo apt-get install moreutils -yy && command -v more
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Run ShellCheck
-        uses: ludeeus/action-shellcheck@master
+        uses: ludeeus/action-shellcheck@00b27aa7cb85167568cb48a3838b75f4265f2bca # master
         env:
           SHELLCHECK_OPTS: -e SC1090 -e SC2119 -e SC1091 -e SC2121 -e SC2155 -e SC2094 -e SC2015
   clap-checks:
@@ -87,7 +87,7 @@ jobs:
     name: Clap checks
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Clap works
         run: ./bin/clap.test
   sns-aggregator-canister-checks:
@@ -95,7 +95,7 @@ jobs:
     name: SNS aggregator tools
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Install apt-dependencies
         run: sudo apt-get update && sudo apt-get install moreutils -yy && command -v more
       - name: Install cargo binstall
@@ -113,7 +113,7 @@ jobs:
         env:
           GH_TOKEN: ${{ github.token }}
       - name: Install dfx
-        uses: dfinity/setup-dfx@main
+        uses: dfinity/setup-dfx@e50c04f104ee4285ec010f10609483cf41e4d365 # main
       - name: "Test the aggregator wasm install command"
         run: ./bin/dfx-software-sns-aggregator-install.test --verbose
         env:
@@ -125,9 +125,9 @@ jobs:
     steps:
       - name: Install apt-dependencies
         run: sudo apt-get update && sudo apt-get install moreutils -yy && command -v more
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Install dfx
-        uses: dfinity/setup-dfx@main
+        uses: dfinity/setup-dfx@e50c04f104ee4285ec010f10609483cf41e4d365 # main
       - name: Import ckbtc works
         run: |
           set -euxo pipefail
@@ -168,7 +168,7 @@ jobs:
     name: NNS dapp tools
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: "Test the nns-dapp version command"
         run: ./bin/dfx-software-nns-dapp-version.test
         env:
@@ -190,9 +190,9 @@ jobs:
     steps:
       - name: Install apt-dependencies
         run: sudo apt-get update && sudo apt-get install moreutils -yy && command -v more
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Install dfx
-        uses: dfinity/setup-dfx@main
+        uses: dfinity/setup-dfx@e50c04f104ee4285ec010f10609483cf41e4d365 # main
       - name: dfx-canister-url works
         run: |
           set -euxo pipefail
@@ -204,14 +204,14 @@ jobs:
     name: Other tests
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Install apt-dependencies
         # Needed for sponge
         run: sudo apt-get update && sudo apt-get install moreutils -yy
       - name: Install idl2json
         run: bin/dfx-software-idl2json-install
       - name: Install dfx
-        uses: dfinity/setup-dfx@main
+        uses: dfinity/setup-dfx@e50c04f104ee4285ec010f10609483cf41e4d365 # main
       - name: Install mock exchange rate canister works
         run: |
           set -euxo pipefail
diff --git a/.github/workflows/run.yml b/.github/workflows/run.yml
index 2362ef0c..c6127d9a 100644
--- a/.github/workflows/run.yml
+++ b/.github/workflows/run.yml
@@ -26,7 +26,7 @@ jobs:
         os: [macos-14, ubuntu-22.04]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Add user path
         run: |
           echo "$HOME/.local/bin" >> $GITHUB_PATH
@@ -38,7 +38,7 @@ jobs:
           echo "/usr/local/bin" >> $GITHUB_PATH
           echo "$(brew --prefix)/opt/gnu-sed/libexec/gnubin" >> $GITHUB_PATH
       - name: Install dfx
-        uses: dfinity/setup-dfx@main
+        uses: dfinity/setup-dfx@e50c04f104ee4285ec010f10609483cf41e4d365 # main
       - name: Install dependencies
         run: ./bin/dfx-sns-demo-install --verbose
       - name: Run the demo with the current default ic commits
@@ -62,7 +62,7 @@ jobs:
         os: [macos-14, ubuntu-22.04]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Add user path
         run: |
           echo "$HOME/.local/bin" >> $GITHUB_PATH
@@ -74,12 +74,12 @@ jobs:
           echo "/usr/local/bin" >> $GITHUB_PATH
           echo "$(brew --prefix)/opt/gnu-sed/libexec/gnubin" >> $GITHUB_PATH
       - name: Install dfx
-        uses: dfinity/setup-dfx@main
+        uses: dfinity/setup-dfx@e50c04f104ee4285ec010f10609483cf41e4d365 # main
       - name: Install dependencies
         run: ./bin/dfx-sns-demo-install --verbose
       # Clone the ic repo so that we can find the latest published commit.
       - name: Checkout ic repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
         with:
           repository: dfinity/ic
           ref: master
diff --git a/.github/workflows/snapshot.yml b/.github/workflows/snapshot.yml
index 74ee4604..0ecc50dc 100644
--- a/.github/workflows/snapshot.yml
+++ b/.github/workflows/snapshot.yml
@@ -21,11 +21,11 @@ jobs:
         os: [ubuntu-22.04]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
         with:
           fetch-depth: 0
       - name: Install dfx
-        uses: dfinity/setup-dfx@main
+        uses: dfinity/setup-dfx@e50c04f104ee4285ec010f10609483cf41e4d365 # main
       - name: Create snapshot
         id: snapshot
         run: |
diff --git a/.github/workflows/update-dfx.yml b/.github/workflows/update-dfx.yml
index b4f47dd7..fdddeabf 100644
--- a/.github/workflows/update-dfx.yml
+++ b/.github/workflows/update-dfx.yml
@@ -16,12 +16,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Create GitHub App Token
-        uses: actions/create-github-app-token@v1
+        uses: actions/create-github-app-token@d72941d797fd3113feb6b93fd0dec494b13a2547 # v1.12.0
         id: app-token
         with:
           app-id: ${{ vars.PR_AUTOMATION_BOT_PUBLIC_APP_ID }}
           private-key: ${{ secrets.PR_AUTOMATION_BOT_PUBLIC_PRIVATE_KEY }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
         # First, check dfx GitHub releases for a new version. We assume that the
         # latest version's tag name is the version.
       - name: Check new dfx version
@@ -48,7 +48,7 @@ jobs:
         # If a newer dfx is available, create a PR.
       - name: Create Pull Request
         if: ${{ steps.update.outputs.updated == '1' }}
-        uses: peter-evans/create-pull-request@v4
+        uses: peter-evans/create-pull-request@38e0b6e68b4c852a5500a94740f0e535e0d7ba54 # v4.2.4
         with:
           token: ${{ steps.app-token.outputs.token }}
           base: main
@@ -65,7 +65,7 @@ jobs:
           # Since the this is a scheduled job, a failure won't be shown on any
           # PR status. To notify the team, we send a message to our Slack channel on failure.
       - name: Notify Slack on failure
-        uses: dfinity/internet-identity/.github/actions/slack@release-2023-08-28
+        uses: dfinity/internet-identity/.github/actions/slack@b278eab440b6adfcb561f18fe24bdea66c1987c3 # release-2023-08-28
         if: ${{ failure() }}
         with:
           WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
diff --git a/.github/workflows/update-ic.yml b/.github/workflows/update-ic.yml
index 2cb34fb1..0d98f9f0 100644
--- a/.github/workflows/update-ic.yml
+++ b/.github/workflows/update-ic.yml
@@ -16,17 +16,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Create GitHub App Token
-        uses: actions/create-github-app-token@v1
+        uses: actions/create-github-app-token@d72941d797fd3113feb6b93fd0dec494b13a2547 # v1.12.0
         id: app-token
         with:
           app-id: ${{ vars.PR_AUTOMATION_BOT_PUBLIC_APP_ID }}
           private-key: ${{ secrets.PR_AUTOMATION_BOT_PUBLIC_PRIVATE_KEY }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Install tools
         run: bin/dfx-software-more-install
         # Clone the ic repo so that we can find the latest published commit.
       - name: Checkout ic repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
         with:
           repository: dfinity/ic
           ref: master
@@ -52,7 +52,7 @@ jobs:
           fi
         # If a newer commit is available, create a PR.
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v4
+        uses: peter-evans/create-pull-request@38e0b6e68b4c852a5500a94740f0e535e0d7ba54 # v4.2.4
         with:
           token: ${{ steps.app-token.outputs.token }}
           base: main
@@ -68,7 +68,7 @@ jobs:
           # Since the this is a scheduled job, a failure won't be shown on any
           # PR status. To notify the team, we send a message to our Slack channel on failure.
       - name: Notify Slack on failure
-        uses: dfinity/internet-identity/.github/actions/slack@release-2023-08-28
+        uses: dfinity/internet-identity/.github/actions/slack@b278eab440b6adfcb561f18fe24bdea66c1987c3 # release-2023-08-28
         if: ${{ failure() }}
         with:
           WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}