diff --git a/Cargo.toml b/Cargo.toml
index 2d1c56e7c..c1512334e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -80,7 +80,6 @@ futures = "0.3.21"
 paste = "1.0.11"
 more-asserts = "0.3.1"
 rand_distr = "0.4.3"
-approx = "0.5.1"
 
 [target.'cfg(not(windows))'.dev-dependencies]
 criterion = { version = "0.5" }