diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 3d65df477e7605..50197dd45545ac 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -30,7 +30,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -52,7 +52,7 @@ jobs:
           pip install -r requirements.txt -r requirements_test.txt
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -79,7 +79,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -95,7 +95,7 @@ jobs:
           exit 1
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -124,7 +124,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -140,7 +140,7 @@ jobs:
           exit 1
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -169,7 +169,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -185,7 +185,7 @@ jobs:
           exit 1
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -236,7 +236,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -252,7 +252,7 @@ jobs:
           exit 1
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -284,7 +284,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -300,7 +300,7 @@ jobs:
           exit 1
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -332,7 +332,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -348,7 +348,7 @@ jobs:
           exit 1
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -377,7 +377,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -393,7 +393,7 @@ jobs:
           exit 1
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -425,7 +425,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -441,7 +441,7 @@ jobs:
           exit 1
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -481,7 +481,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -497,7 +497,7 @@ jobs:
           exit 1
       - name: Restore pre-commit environment from cache
         id: cache-precommit
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: ${{ env.PRE_COMMIT_HOME }}
           key: |
@@ -529,7 +529,7 @@ jobs:
       - name:
           Restore full Python ${{ matrix.python-version }} virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -561,7 +561,7 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore base Python virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -592,7 +592,7 @@ jobs:
         uses: actions/checkout@v2
       - name: Restore full Python ${{ matrix.python-version }} virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -627,7 +627,7 @@ jobs:
         uses: actions/checkout@v2
       - name: Restore full Python ${{ matrix.python-version }} virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -661,7 +661,7 @@ jobs:
         uses: actions/checkout@v2
       - name: Restore full Python ${{ matrix.python-version }} virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -697,7 +697,7 @@ jobs:
         uses: actions/checkout@v2
       - name: Restore full Python ${{ matrix.python-version }} virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
@@ -757,7 +757,7 @@ jobs:
         uses: actions/checkout@v2
       - name: Restore full Python ${{ matrix.python-version }} virtual environment
         id: cache-venv
-        uses: actions/cache@v2
+        uses: actions/cache@v3.0.11
         with:
           path: venv
           key: >-
diff --git a/homeassistant/components/sensehat/sensor.py b/homeassistant/components/sensehat/sensor.py
index 3966e52f1a8508..67beb021d899bb 100644
--- a/homeassistant/components/sensehat/sensor.py
+++ b/homeassistant/components/sensehat/sensor.py
@@ -1,7 +1,7 @@
 """Support for Sense HAT sensors."""
 from datetime import timedelta
 import logging
-import os
+from pathlib import Path
 
 from sense_hat import SenseHat
 import voluptuous as vol
@@ -43,9 +43,8 @@
 
 def get_cpu_temp():
     """Get CPU temperature."""
-    res = os.popen("vcgencmd measure_temp").readline()
-    t_cpu = float(res.replace("temp=", "").replace("'C\n", ""))
-    return t_cpu
+    t_cpu = Path("/sys/class/thermal/thermal_zone0/temp").read_text().strip()
+    return float(t_cpu) * 0.001
 
 
 def get_average(temp_base):