diff --git a/stack.yaml b/stack.yaml
index 583811e03..dd31c6cac 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -15,7 +15,6 @@ extra-deps:
 - haddock-library-1.6.0
 - HsYAML-0.1.1.1
 - network-2.7.0.2
-- aeson-pretty-0.8.5
 ghc-options:
    "$locals": -fhide-source-paths -XNoImplicitPrelude
 resolver: lts-12.0