diff --git a/tools/cli/Cargo.toml b/tools/cli/Cargo.toml
index 0583e311..67554a93 100644
--- a/tools/cli/Cargo.toml
+++ b/tools/cli/Cargo.toml
@@ -12,9 +12,6 @@ name = "mentat_cli"
 doc = false
 test = false
 
-[build-dependencies]
-rustc-serialize = "0.3.24"
-
 [dependencies]
 getopts = "0.2"
 env_logger = "0.3"