diff --git a/01_introduction_to_algorithms/Purescript/packages.dhall b/01_introduction_to_algorithms/Purescript/packages.dhall
index 093fe82..97dadbd 100644
--- a/01_introduction_to_algorithms/Purescript/packages.dhall
+++ b/01_introduction_to_algorithms/Purescript/packages.dhall
@@ -119,7 +119,7 @@ let additions =
 
 
 let upstream =
-      https://github.com/purescript/package-sets/releases/download/psc-0.13.6-20200226/packages.dhall sha256:3a52562e05b31a7b51d12d5b228ccbe567c527781a88e9028ab42374ab55c0f1
+      https://github.com/purescript/package-sets/releases/download/psc-0.13.8-20200724/packages.dhall sha256:bb941d30820a49345a0e88937094d2b9983d939c9fd3a46969b85ce44953d7d9
 
 let overrides = {=}