diff --git a/Cargo.toml b/Cargo.toml
index 9271464..e42db51 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,5 +9,5 @@ keywords = ["riscv", "register", "peripheral"]
 license = "ISC"
 
 [dependencies]
-bare-metal = "0.1.1"
-volatile-register = "0.2.0"
\ No newline at end of file
+bare-metal = "^0.1.1"
+volatile-register = "^0.2.0"
\ No newline at end of file