diff --git a/Cargo.toml b/Cargo.toml
index ca62706..dcae835 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,4 +21,4 @@ libc = "0.2"
 jsonnet-sys = { path = "jsonnet-sys", version = "0.17.0" }
 
 [dev-dependencies]
-clap = "2.31"
+clap = "3.1"