diff --git a/Cargo.toml b/Cargo.toml
index 2f05a3e211af95e51c6c5df665f9d111756e0765..75b3a4215d44c41b9c752867d3a21c40acc63490 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,6 +27,7 @@ backtrace = "0.3"
 
 [dev-dependencies]
 test-generator = "0.3.0"
+crossbeam-utils = "0.7.0"
 
 [lib]
 crate-type = ["cdylib"]