diff --git a/Cargo.toml b/Cargo.toml
index bbfc980..1f247ea 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+pretty_assertions = "1.2.1"
 
 [dev-dependencies]
 rand = "0.8.5"