diff --git a/api_design/README.md b/api_design/README.md
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--- a/api_design/README.md
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 # API Design
 
-* [Architectural Styles and the Design of Network-based Software Architectures (REST) by Roy Fielding](https://www.ics.uci.edu/~fielding/pubs/dissertation/fielding_dissertation.pdf)
+* [Architectural Styles and the Design of Network-based Software Architectures (REST) by Roy Fielding](https://roy.gbiv.com/pubs/dissertation/fielding_dissertation.pdf)
 
-* :scroll: [Little Manual of API Design](api-design.pdf)
\ No newline at end of file
+* :scroll: [Little Manual of API Design](api-design.pdf)