diff --git a/derive_builder_core/Cargo.toml b/derive_builder_core/Cargo.toml
index 8517ecd..886ac02 100644
--- a/derive_builder_core/Cargo.toml
+++ b/derive_builder_core/Cargo.toml
@@ -23,4 +23,4 @@ quote = "1.0.18"
 syn = { version = "1.0.91", features = ["full", "extra-traits"] }
 
 [dev-dependencies]
-pretty_assertions = "0.6.1"
+pretty_assertions = "1.2.1"