diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index bdd6efb..6c81d31 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -30,10 +30,16 @@ jobs:
         arch:
           - x64
     steps:
-      - name: Install dependencies
-        run: |
-          pip install matplotlib
       - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3'
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip
+      - run: pip install matplotlib
+        shell: bash
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
@@ -51,10 +57,16 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - name: Install dependencies
-        run: |
-          pip install matplotlib
       - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3'
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip
+      - run: pip install matplotlib
+        shell: bash
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1'
diff --git a/Project.toml b/Project.toml
index 7379e90..c48bd5d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Batsrus"
 uuid = "e74ebddf-6ac1-4047-a0e5-c32c99e57753"
 authors = ["Hongyang Zhou <hyzhou@umich.edu>"]
-version = "0.6.6"
+version = "0.6.7"
 
 [deps]
 FortranFiles = "c58ffaec-ab22-586d-bfc5-781a99fd0b10"