diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 2346d94..56a899c 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -34,7 +34,7 @@ jobs:
           deno-version: v2.x
 
       - name: Cache WASM
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
         id: wasm-cache
         with:
           path: |
@@ -47,7 +47,7 @@ jobs:
         run: make
 
       - name: Cache dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
         id: deno-cache
         with:
           path: node_modules
@@ -58,7 +58,7 @@ jobs:
         run: deno install
 
       - name: Upload build artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: bench-build
           retention-days: 1
@@ -76,7 +76,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Setup Node
         uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
@@ -84,7 +84,7 @@ jobs:
           node-version: 24
 
       - name: Download build artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: bench-build
 
@@ -104,20 +104,20 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Setup Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 24
 
       - name: Download build artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: bench-build
 
       - name: Run process startup benchmarks
-        uses: CodSpeedHQ/action@v4
+        uses: CodSpeedHQ/action@9d332c4d90b43981c3e55ae8e38e68709996240f # v4.17.0
         with:
           mode: walltime
           run: node bench/startup.bench.ts