diff --git a/docs/电子基础/signal.en.md b/docs/电子基础/signal.en.md
index e570d099..785de8a1 100644
--- a/docs/电子基础/signal.en.md
+++ b/docs/电子基础/signal.en.md
@@ -12,7 +12,7 @@ The essence of this course is the 6 incredibly interesting Labs that will allow
 
 ## Course Resources
 
-- Course Website: <https://inst.eecs.berkeley.edu/~ee126/fa20/content.html>
+- Course Website: <https://inst.eecs.berkeley.edu/~ee120/fa19/>
 - Recordings: refer to course website
 - Assignments: refer to course website