diff --git a/test/rs/Cargo.toml b/test/rs/Cargo.toml
index df84504..9b35e3c 100644
--- a/test/rs/Cargo.toml
+++ b/test/rs/Cargo.toml
@@ -6,7 +6,7 @@
 publish = false
 
 [dependencies]
-clap = "2.18.0"
+clap = "<2.28.0"
 env_logger = "0.4.0"
 log = "0.3.7"
 ordered-float = "0.3.0"