diff --git a/tensorflow/intro-to-tensorflow/requirements.txt b/tensorflow/intro-to-tensorflow/requirements.txt
old mode 100755
new mode 100644
index 1ecc596..0658e15
--- a/tensorflow/intro-to-tensorflow/requirements.txt
+++ b/tensorflow/intro-to-tensorflow/requirements.txt
@@ -1 +1 @@
-tensorflow==1.0.0
+tensorflow==1.15.2