diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -165,12 +165,12 @@
             return (fmap (builder . Text.pack) (rights parsed))
   where
     parseNodes str =
-        let splitted = Text.splitOn "," str
+        let splitted = filter (/= Text.empty) (Text.strip <$> Text.splitOn "," str)
         in fmap (ensurePort . validate) splitted
     validate s = (s, hostAndPort (Text.unpack s))
-    ensurePort (s, (Left _)) = Left ("Invalid slave address: " <> s)
-    ensurePort (s, (Right (_, Nothing))) = Left ("Invalid slave address. Missing port for: " <> s)
-    ensurePort (_, (Right ((host, Just port)))) = Right (host <> ":" <> port)
+    ensurePort (s, Left _) = Left ("Invalid slave address: " <> s)
+    ensurePort (s, Right (_, Nothing)) = Left ("Invalid slave address. Missing port for: " <> s)
+    ensurePort (_, Right (host, Just port)) = Right (host <> ":" <> port)
 
 ----------------------------------
 -- Routes and middleware
diff --git a/wrecker-ui.cabal b/wrecker-ui.cabal
--- a/wrecker-ui.cabal
+++ b/wrecker-ui.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: dea0db90c415ddb4073e55a6a59a9a36d1c00891558d254715e483383cf7179a
+-- hash: 741cebc9d0ce3d6b63be18821ada7b9fa21d9606970059dd7a3f1ceb011d2930
 
 name:           wrecker-ui
-version:        3.1.0.0
+version:        3.1.1.0
 synopsis:       A web interface for Wrecker, the HTTP Performance Benchmarker
 description:    'wrecker-ui' is a web based interface to visualize performance tests built using the wrecker library and schedule test runs.
 category:       Web