diff --git a/crates/tools/Cargo.toml b/crates/tools/Cargo.toml
index 20b23d456..77f25c491 100644
--- a/crates/tools/Cargo.toml
+++ b/crates/tools/Cargo.toml
@@ -9,6 +9,6 @@ teraron = "0.0.1"
 clap = "2.32.0"
 failure = "0.1.7"
 ron = "0.4.2"
-cbindgen = "0.14.0"
+cbindgen = "= 0.14.0"
 bindgen = "0.51"
 difference = "2.0"