diff --git a/README.md b/README.md
index d5e908a..ce24112 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ sudo apt install python3-setuptools python3-pip python3-yaml python3-smbus pytho
 
 * Run `sudo pip3 install growhat`
 
-**Note** this wont perform any of the required configuration changes on your Pi, you may additionally need to:
+**Note** this won't perform any of the required configuration changes on your Pi, you may additionally need to:
 
 * Enable i2c: `sudo raspi-config nonint do_i2c 0`
 * Enable SPI: `sudo raspi-config nonint do_spi 0`
diff --git a/examples/tools/calibrate-pump.py b/examples/tools/calibrate-pump.py
index 7a941b1..3a8756c 100644
--- a/examples/tools/calibrate-pump.py
+++ b/examples/tools/calibrate-pump.py
@@ -174,7 +174,7 @@ try:
             fill=(255, 255, 255) if mode == 2 else (128, 128, 128),
         )
 
-        # Button lavel backgrounds
+        # Button label backgrounds
         draw.rectangle((0, 0, 42, 14), (255, 255, 255))
         draw.rectangle((display.width - 15, 0, display.width, 14), (255, 255, 255))
         draw.rectangle(
diff --git a/pyproject.toml b/pyproject.toml
index d30edaf..5f1295f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -88,6 +88,7 @@ line-length = 200
 
 [tool.codespell]
 skip = """
+./service/install.sh,\
 ./.tox,\
 ./.egg,\
 ./.git,\