diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c3e394aa5..8e74bc6dc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,7 +31,7 @@ jobs:
         run: npm ci
 
       - name: Restore cached PDF files
-        uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: test/pdfs/*.pdf
           key: cached-pdf-files-${{ hashFiles('test/pdfs/*.pdf') }}
diff --git a/.github/workflows/coverage_browser_tests.yml b/.github/workflows/coverage_browser_tests.yml
index 8188d40fb..5820c9f4d 100644
--- a/.github/workflows/coverage_browser_tests.yml
+++ b/.github/workflows/coverage_browser_tests.yml
@@ -68,7 +68,7 @@ jobs:
         run: npm ci
 
       - name: Restore cached PDF files
-        uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: test/pdfs/*.pdf
           key: cached-pdf-files-${{ hashFiles('test/pdfs/*.pdf') }}
diff --git a/.github/workflows/integration_tests.yml b/.github/workflows/integration_tests.yml
index b6097e223..cbd67ccb4 100644
--- a/.github/workflows/integration_tests.yml
+++ b/.github/workflows/integration_tests.yml
@@ -62,7 +62,7 @@ jobs:
         run: npm ci
 
       - name: Restore cached PDF files
-        uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: test/pdfs/*.pdf
           key: cached-pdf-files-${{ hashFiles('test/pdfs/*.pdf') }}
diff --git a/.github/workflows/publish_coverage_index.yml b/.github/workflows/publish_coverage_index.yml
index c2c10821e..e28705f1d 100644
--- a/.github/workflows/publish_coverage_index.yml
+++ b/.github/workflows/publish_coverage_index.yml
@@ -60,7 +60,7 @@ jobs:
         run: npm ci
 
       - name: Restore cached PDF files
-        uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: test/pdfs/*.pdf
           key: cached-pdf-files-${{ hashFiles('test/pdfs/*.pdf') }}
diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 2476e598e..e5d36113c 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -62,7 +62,7 @@ jobs:
         run: npm ci
 
       - name: Restore cached PDF files
-        uses: actions/cache/restore@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: test/pdfs/*.pdf
           key: cached-pdf-files-${{ hashFiles('test/pdfs/*.pdf') }}