diff --git a/README.md b/README.md
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+++ b/README.md
@@ -32,7 +32,7 @@ Courses | School | Duration | Effort | Frequency | Prerequisites
 [Calculus 1C: Coordinate Systems & Infinite Series](https://www.edx.org/course/calculus-1c-coordinate-systems-infinite-mitx-18-01-3x-0)| MIT | 8 weeks | 6-10 hours/week | self-paced | Calculus 1B: Integration
 [Linear Algebra - Foundations to Frontiers](https://www.edx.org/course/linear-algebra-foundations-to-frontiers) | UT Austin | 15 weeks | 6-10 hours/week | self-paced | [pre-calculus](https://www.edx.org/course/precalculus-asux-mat170x)
 [Introduction to Probability and Data](https://click.linksynergy.com/deeplink?id=PtFMiHYfEVk&mid=40328&murl=https%3A%2F%2Fwww.coursera.org%2Flearn%2Fprobability-intro) | Duke | 5 weeks | 5-7 hours/week | twice a month | none
-[Intro to Statistics ](https://www.udacity.com/course/intro-to-statistics--st101) | Udacity | 8 weeks | 5-7 hours/week | self-paced | none
+[Intro to Statistics ](https://imp.i115008.net/intro-to-statistics) | Udacity | 8 weeks | 5-7 hours/week | self-paced | none
 
 
 ## Systems
@@ -66,5 +66,5 @@ Courses | School | Duration | Effort | Frequency | Prerequisites
 
 Courses | School | Duration | Effort | Frequency | Prerequisites
 :-- | :--: | :--: | :--: | :--: | :--:
-[Linux Command Line Basics](https://www.udacity.com/course/linux-command-line-basics--ud595) | Udacity | 1 week | 5 hours/week | self-paced | none
+[Linux Command Line Basics](https://imp.i115008.net/linux-command-line-basics) | Udacity | 1 week | 5 hours/week | self-paced | none
 [The Unix Workbench](https://click.linksynergy.com/deeplink?id=PtFMiHYfEVk&mid=40328&murl=https%3A%2F%2Fwww.coursera.org%2Flearn%2Funix) | JHU | 4 weeks | 4 hours/week | once a month | none