diff --git a/.github/workflows/test-linux-build.yml b/.github/workflows/test-linux-build.yml
index eaaa311..9ccd825 100644
--- a/.github/workflows/test-linux-build.yml
+++ b/.github/workflows/test-linux-build.yml
@@ -29,7 +29,7 @@ jobs:
       ### libcasm-global ###
       - name: restore libcasm-global cache
         id: cache-libcasm-global-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: CASMcode_global/dist
           key: ${{ runner.os }}-libcasm-global-v2-0-3
@@ -37,7 +37,7 @@ jobs:
       ### libcasm-xtal ###
       - name: restore libcasm-xtal cache
         id: cache-libcasm-xtal-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: CASMcode_crystallography/dist
           key: ${{ runner.os }}-libcasm-xtal-v2-0a8
diff --git a/.github/workflows/test-linux-cxx-only.yml b/.github/workflows/test-linux-cxx-only.yml
index 7cbda35..d440041 100644
--- a/.github/workflows/test-linux-cxx-only.yml
+++ b/.github/workflows/test-linux-cxx-only.yml
@@ -29,7 +29,7 @@ jobs:
       ### libcasm-global ###
       - name: restore libcasm-global cache
         id: cache-libcasm-global-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: CASMcode_global/dist
           key: ${{ runner.os }}-libcasm-global-v2-0-3
@@ -37,7 +37,7 @@ jobs:
       ### libcasm-xtal ###
       - name: restore libcasm-xtal cache
         id: cache-libcasm-xtal-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: CASMcode_crystallography/dist
           key: ${{ runner.os }}-libcasm-xtal-v2-0a8
diff --git a/.github/workflows/test-linux-dependencies.yml b/.github/workflows/test-linux-dependencies.yml
index 86ee88e..e748127 100644
--- a/.github/workflows/test-linux-dependencies.yml
+++ b/.github/workflows/test-linux-dependencies.yml
@@ -21,7 +21,7 @@ jobs:
       ### libcasm-global ###
       - name: restore libcasm-global cache
         id: cache-libcasm-global-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: CASMcode_global/dist
           key: ${{ runner.os }}-libcasm-global-v2-0-3
@@ -47,7 +47,7 @@ jobs:
 
       - name: save libcasm-global cache
         id: cache-libcasm-global-save
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         with:
           path: CASMcode_global/dist
           key: ${{ steps.cache-libcasm-global-restore.outputs.cache-primary-key }}
@@ -55,7 +55,7 @@ jobs:
       ### libcasm-xtal ###
       - name: restore libcasm-xtal cache
         id: cache-libcasm-xtal-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: CASMcode_crystallography/dist
           key: ${{ runner.os }}-libcasm-xtal-v2-0a8
@@ -81,7 +81,7 @@ jobs:
 
       - name: save libcasm-xtal cache
         id: cache-libcasm-xtal-save
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         with:
           path: CASMcode_crystallography/dist
           key: ${{ steps.cache-libcasm-xtal-restore.outputs.cache-primary-key }}
diff --git a/.github/workflows/test-linux.yml b/.github/workflows/test-linux.yml
index 3e9b8d2..2d88999 100644
--- a/.github/workflows/test-linux.yml
+++ b/.github/workflows/test-linux.yml
@@ -29,7 +29,7 @@ jobs:
       ### libcasm-global ###
       - name: restore libcasm-global cache
         id: cache-libcasm-global-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: CASMcode_global/dist
           key: ${{ runner.os }}-libcasm-global-v2-0-3
@@ -37,7 +37,7 @@ jobs:
       ### libcasm-xtal ###
       - name: restore libcasm-xtal cache
         id: cache-libcasm-xtal-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           path: CASMcode_crystallography/dist
           key: ${{ runner.os }}-libcasm-xtal-v2-0a8