diff --git a/examples/compensated-temperature.py b/examples/compensated-temperature.py
index 071bbfb..53e72a5 100755
--- a/examples/compensated-temperature.py
+++ b/examples/compensated-temperature.py
@@ -32,7 +32,7 @@ sensor.set_filter(bme680.FILTER_SIZE_3)
 def get_cpu_temperature():
     process = Popen(['vcgencmd', 'measure_temp'], stdout=PIPE)
     output, _error = process.communicate()
-    return float(output[output.index('=') + 1:output.rindex("'")])
+    return float(output[output.index(b'=') + 1:output.rindex(b"'")])
 
 
 factor = 1.0  # Smaller numbers adjust temp down, vice versa
diff --git a/library/setup.py b/library/setup.py
index f40026b..996822e 100755
--- a/library/setup.py
+++ b/library/setup.py
@@ -50,5 +50,5 @@ setup(
     classifiers=classifiers,
     packages=['bme680'],
     py_modules=[],
-    install_requires=[]
+    install_requires=['smbus']  # preferably: install `python3-smbus` instead of relying on this
 )