diff --git a/helpers.py b/helpers.py
index b02babf70acf2f8756ab9302c7bc3e3f2e7727b2..b6cf164a1d711d7968010f4d126b3ea1088d17de 100644
--- a/helpers.py
+++ b/helpers.py
@@ -184,7 +184,7 @@ class EpochTimer(Callback):
         #   self.output = open(log_filename,'a')
         #   self.epoch = pd.read_csv(log_filename).Epoch.max()
         # else:
-        self.output = open(log_filename,'w')
+        self.output = open(log_filename,'a')
         self.output.write("{0},{1},{2},{3},{4},{5}\n".format("Epoch","Execution Time","Loss","Val_Loss","Accuracy","Accuracy_val"))
         self.output.flush()