diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index a87aacc..528e3e4 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 249d9ee..e237036 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 45
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 1
 
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 1815a38..2b45975 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/fuzz.yml b/.github/workflows/fuzz.yml
index 4fde09d..5c44a19 100644
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -36,7 +36,7 @@ jobs:
       matrix:
         test: [invariant_subscriptions, invariant_subscriptions_t22, invariant_subscriptions_hook]
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 1
 
@@ -46,7 +46,7 @@ jobs:
           solana-version: ${{ env.SOLANA_VERSION }}
 
       - name: Cache crucible CLI
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
         with:
           path: ~/.cargo/bin/crucible
           key: crucible-cli-${{ env.CRUCIBLE_REV }}
@@ -72,7 +72,7 @@ jobs:
 
       - name: Upload crashes
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: fuzz-smoke-crashes-${{ matrix.test }}
           path: fuzz/subscriptions/crashes/
@@ -89,7 +89,7 @@ jobs:
       matrix:
         test: [invariant_subscriptions, invariant_subscriptions_t22, invariant_subscriptions_hook]
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 1
 
@@ -99,7 +99,7 @@ jobs:
           solana-version: ${{ env.SOLANA_VERSION }}
 
       - name: Cache crucible CLI
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
         with:
           path: ~/.cargo/bin/crucible
           key: crucible-cli-${{ env.CRUCIBLE_REV }}
@@ -108,7 +108,7 @@ jobs:
         run: command -v crucible >/dev/null || just install-fuzzer
 
       - name: Restore corpus
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
         with:
           path: fuzz/subscriptions/corpus-${{ matrix.test }}
           key: fuzz-corpus-${{ matrix.test }}-${{ github.run_id }}
@@ -127,7 +127,7 @@ jobs:
 
       - name: Upload crashes
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: fuzz-nightly-crashes-${{ matrix.test }}
           path: fuzz/subscriptions/crashes/
diff --git a/.github/workflows/idl-check.yml b/.github/workflows/idl-check.yml
index 8ded10e..982d2cc 100644
--- a/.github/workflows/idl-check.yml
+++ b/.github/workflows/idl-check.yml
@@ -9,7 +9,7 @@ jobs:
   check-generated:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - uses: ./.github/actions/setup
         with:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index cf4a756..13613cd 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/publish-rust.yml b/.github/workflows/publish-rust.yml
index 8defeac..306cd0d 100644
--- a/.github/workflows/publish-rust.yml
+++ b/.github/workflows/publish-rust.yml
@@ -51,7 +51,7 @@ jobs:
       run:
         working-directory: clients/rust
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 0
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -63,17 +63,17 @@ jobs:
           git config user.email "github-actions[bot]@users.noreply.github.com"
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@4360b52568e2003a75bf9bc1d59f33a8e3fc893c # stable
         with:
           components: rustfmt, clippy
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version-file: '.nvmrc'
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v6.0.7
+        uses: pnpm/action-setup@739bfe42ca9233c5e6aca07c1a25a9d34aca49b0 # v6.0.7
 
       - name: Install dependencies
         working-directory: .
@@ -123,7 +123,7 @@ jobs:
 
       - name: Create GitHub Release
         if: ${{ inputs.create-github-release }}
-        uses: actions/github-script@v9
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
diff --git a/.github/workflows/publish-typescript.yml b/.github/workflows/publish-typescript.yml
index e5b2392..8e7e379 100644
--- a/.github/workflows/publish-typescript.yml
+++ b/.github/workflows/publish-typescript.yml
@@ -45,7 +45,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 0
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -56,16 +56,16 @@ jobs:
           git config user.email "github-actions[bot]@users.noreply.github.com"
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@4360b52568e2003a75bf9bc1d59f33a8e3fc893c # stable
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version-file: '.nvmrc'
           registry-url: 'https://registry.npmjs.org'
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v6.0.7
+        uses: pnpm/action-setup@739bfe42ca9233c5e6aca07c1a25a9d34aca49b0 # v6.0.7
         with:
           run_install: false
 
@@ -75,7 +75,7 @@ jobs:
           echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_ENV
 
       - name: Setup pnpm cache
-        uses: actions/cache@v6.1.0
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: ${{ env.STORE_PATH }}
           key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
@@ -126,7 +126,7 @@ jobs:
 
       - name: Create GitHub Release
         if: ${{ github.event.inputs.dry-run != 'true' }}
-        uses: actions/github-script@v9
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 13150e8..891e161 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 120
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index a0852ef..1f175c1 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -18,14 +18,14 @@ jobs:
   cargo-audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - uses: ./.github/actions/setup
         with:
           install-solana: 'false'
           install-just: 'false'
           install-pnpm: 'false'
           rust-cache-key: 'cargo-audit'
-      - uses: taiki-e/install-action@v2.82.0
+      - uses: taiki-e/install-action@b8cecb83565409bcc297b2df6e77f030b2a468d5 # v2.82.0
         with:
           tool: cargo-audit
       - run: cargo audit
@@ -33,7 +33,7 @@ jobs:
   pnpm-audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - uses: ./.github/actions/setup
         with:
           install-rust: 'false'
@@ -46,7 +46,7 @@ jobs:
   miri:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - uses: ./.github/actions/setup
         with:
           rust-toolchain: 'nightly'
@@ -55,7 +55,7 @@ jobs:
           install-just: 'false'
           install-pnpm: 'false'
           rust-cache-key: 'miri'
-      - uses: actions/cache@v6.1.0
+      - uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: |
             ~/.cache/org.rust-lang.miri
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index f2bfae3..e7f9470 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -11,7 +11,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v10.3.0
+      - uses: actions/stale@eb5cf3af3ac0a1aa4c9c45633dd1ae542a27a899 # v10.3.0
         with:
           days-before-pr-stale: 30
           days-before-pr-close: 5
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2dbecf6..e6a2cf0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 1
 
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 1
 
@@ -55,7 +55,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 1