diff --git a/lmdb-sys/Cargo.toml b/lmdb-sys/Cargo.toml
index 5c8f433..e7377e0 100644
--- a/lmdb-sys/Cargo.toml
+++ b/lmdb-sys/Cargo.toml
@@ -19,5 +19,5 @@ build = "build.rs"
 libc = "0.2"
 
 [build-dependencies]
-pkg-config = "0.3"
+pkg-config = "0.3.2"
 cc = "1"