diff --git a/README.md b/README.md
index b0b345b43cfc676bb00828c4c660d94663ff754a..7e264f5ee88f29d61342ade6f61b8cec4c7c8594 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Details for the next session:
 
 | Time  | Subject                                                                                | Teacher           | Contents                  |
 | ----- | -----------------                                                                      | ----------------- | ------------------------- |
-| 10:00 | [Introduction](/uploads/8d5bda06500f9aaa7c117aa6f4738667/introduction.pdf)             | Mihai Lefter      | Welcome, version control introduction |
+| 10:00 | [Introduction](/uploads/ccbce60d8d17dd5e9d7949d91cc20a57/introduction.pdf)             | Mihai Lefter      | Welcome, version control introduction |
 | 10:30 | [Git basics](http:bit.ly/1WlfXyj)                                                      | Wibowo Arindrarto | Basic Git command line flow |
 | 11:15 | [Practical](/uploads/eb2e001db4f605a343e19d23d40e754f/basics_handouts.pdf)             |                   |                           |
 | 12:00 | Lunch                                                                                  |                   |                           |