diff --git a/predictionio.gemspec b/predictionio.gemspec
index cbfd196..a7db2f5 100644
--- a/predictionio.gemspec
+++ b/predictionio.gemspec
@@ -8,7 +8,7 @@
 PredictionIO is a prediction server for building smart applications. This gem
 provides convenient access of the PredictionIO API to Ruby programmers so that
 they can focus on application logic.
-  EOF
+EOF
   s.version = PredictionIO::VERSION
   s.licenses = ['Apache-2.0']
   s.author = 'The PredictionIO Team'