diff --git a/.gitignore b/.gitignore
index 4144c79..47b6a0c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,5 @@
 build/
 dist/
 htmlcov/
+.p3
+.vscode
diff --git a/setup.py b/setup.py
index c5ab2ff..ca5c8a5 100644
--- a/setup.py
+++ b/setup.py
@@ -38,7 +38,7 @@
     keywords = 'prometheus monitoring temperature sensor temper',
     packages = ['temper_exporter'],
     install_requires = [
-        'prometheus_client',
+        'prometheus_client==0.3.0',
         'pyudev',
         'setuptools',
     ],