diff --git a/train/1-multiply.py b/train/1-multiply.py
index 33c9844..335a9a3 100644
--- a/train/1-multiply.py
+++ b/train/1-multiply.py
@@ -4,7 +4,7 @@
 def run_training():
     x = tf.placeholder("float") # Create a placeholder 'x'
     w = tf.Variable(5.0, name="weights")
-    y = tf.mul(w, x)
+    y = tf.multiply(w, x)
 
     with tf.Session() as sess:
         # Add the variable initializer Op.
@@ -18,4 +18,4 @@ def main(_):
     run_training()
 
 if __name__ == '__main__':
-    tf.app.run()
\ No newline at end of file
+    tf.app.run()
diff --git a/train/2-input.py b/train/2-input.py
index 43e87ba..9502018 100644
--- a/train/2-input.py
+++ b/train/2-input.py
@@ -15,7 +15,7 @@ def run_training():
 
   x = tf.placeholder("float") # Create a placeholder 'x'
   w = tf.Variable(5.0, name="weights")
-  y = tf.mul(w, x)
+  y = tf.multiply(w, x)
 
   with tf.Session() as sess:
     # Add the variable initializer Op.
@@ -38,4 +38,4 @@ def main(_):
   run_training()
 
 if __name__ == '__main__':
-  tf.app.run()
\ No newline at end of file
+  tf.app.run()
diff --git a/train/3-output.py b/train/3-output.py
index a277197..dc52ca3 100644
--- a/train/3-output.py
+++ b/train/3-output.py
@@ -10,7 +10,7 @@
 def run_training():
     x = tf.placeholder("float") # Create a placeholder 'x'
     w = tf.Variable(5.0, name="weights")
-    y = tf.mul(w, x)
+    y = tf.multiply(w, x)
 
     with tf.Session() as sess:
         # Add the variable initializer Op.
@@ -29,4 +29,4 @@ def main(_):
     run_training()
 
 if __name__ == '__main__':
-    tf.app.run()
\ No newline at end of file
+    tf.app.run()