diff --git a/build/Cargo.toml b/build/Cargo.toml
index 226acea..00febda 100644
--- a/build/Cargo.toml
+++ b/build/Cargo.toml
@@ -10,7 +10,7 @@ clap = "2.24"
 parity-wasm = "0.15"
 
 [dev-dependencies]
-tempdir = "*"
+tempdir = "0.3"
 
 [[bin]]
 name = "wasm-build"