diff --git a/senpy/plugins/sentiment140/sentiment140.py b/senpy/plugins/sentiment140/sentiment140.py
index 99aefd8..a0431fc 100644
--- a/senpy/plugins/sentiment140/sentiment140.py
+++ b/senpy/plugins/sentiment140/sentiment140.py
@@ -20,9 +20,10 @@ class Sentiment140Plugin(SentimentPlugin):
         polarity_value = self.maxPolarityValue*int(res.json()["data"][0]
                                                    ["polarity"]) * 0.25
         polarity = "marl:Neutral"
-        if polarity_value > 50:
+        neutral_value = self.maxPolarityValue / 2.0
+        if polarity_value > neutral_value:
             polarity = "marl:Positive"
-        elif polarity_value < 50:
+        elif polarity_value < neutral_value:
             polarity = "marl:Negative"
         entry = Entry(id="Entry0",
                       text=params["input"],
diff --git a/setup.py b/setup.py
index 99fae45..cff5ca8 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@ except AttributeError:
 install_reqs = [str(ir.req) for ir in install_reqs]
 test_reqs = [str(ir.req) for ir in test_reqs]
 
-VERSION = "0.4.8"
+VERSION = "0.4.9"
 
 setup(
     name='senpy',