diff --git a/setup.py b/setup.py
index 9750bac..004c806 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setuptools.setup(
         name="showtools",
-        version="2.0.2",
+        version="2.0.3",
         author="louwrentius",
         description="Show storage and network devices in table format on cli",
         long_description=long_description,
diff --git a/showtools/showlib/disk.py b/showtools/showlib/disk.py
index aa0bfea..ee3e924 100644
--- a/showtools/showlib/disk.py
+++ b/showtools/showlib/disk.py
@@ -13,8 +13,9 @@ def get_block_devices():
     diskdevices = os.listdir(devicepath)
     diskdevices.sort()
     validdevices = []
+    invaliddevices = ("md","ram","loop","sr")
     for device in diskdevices:
-        if not device.startswith("md") and not device.startswith("ram") and not device.startswith("loop"):
+        if not device.startswith(invaliddevices):
             validdevices.append(device)
     return validdevices