diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index 3956d1a..684eccc 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -35,6 +35,18 @@ jobs:
         ENERGYPLUS_SHA: ${{ matrix.energyplus-sha }}
         ENERGYPLUS_INSTALL_VERSION: ${{ matrix.energyplus-install }}
       run: bash ./install_energyplus.sh
+    - name: Get pip cache dir
+      id: pip-cache
+      run: |
+        echo "::set-output name=dir::$(pip cache dir)"
+    - name: pip cache
+      id: cache
+      uses: actions/cache@v2
+      with:
+        path: ${{ steps.pip-cache.outputs.dir }}
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip