diff --git a/Cargo.toml b/Cargo.toml
index 4594724..4e1c3e1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,5 +12,5 @@ license = "Unlicense"
 description = "Raw duktape bindings for rust."
 
 [build-dependencies]
-cc = "*"
-bindgen = "*"
\ No newline at end of file
+cc = "1.0.28"
+bindgen = "0.47.0"
\ No newline at end of file