diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 614186bd..c51d2169 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -17,7 +17,7 @@ jobs:
         with:
           python-version: "3.12"
       
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-docs-${{ hashFiles('docs/requirements.txt') }}
diff --git a/.github/workflows/doctest_validation.yml b/.github/workflows/doctest_validation.yml
index a34a6e4b..0275c360 100644
--- a/.github/workflows/doctest_validation.yml
+++ b/.github/workflows/doctest_validation.yml
@@ -36,7 +36,7 @@ jobs:
         echo "env_name=solarwindpy" >> $GITHUB_OUTPUT
     
     - name: Cache conda environment
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/conda_pkgs_dir
         key: ${{ runner.os }}-conda-${{ hashFiles(steps.find-conda-env.outputs.conda_env_file) }}
@@ -228,7 +228,7 @@ jobs:
         echo "env_name=solarwindpy" >> $GITHUB_OUTPUT
     
     - name: Cache conda environment
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/conda_pkgs_dir
         key: ${{ runner.os }}-conda-${{ hashFiles(steps.find-conda-env-spot.outputs.conda_env_file) }}
diff --git a/.github/workflows/sync-requirements.yml b/.github/workflows/sync-requirements.yml
index 16c7062d..3f0c407f 100644
--- a/.github/workflows/sync-requirements.yml
+++ b/.github/workflows/sync-requirements.yml
@@ -23,7 +23,7 @@ jobs:
           python-version: "3.11"
       
       - name: Cache pip packages
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-sync-${{ hashFiles('requirements-dev.txt') }}