diff --git a/Cargo.toml b/Cargo.toml
index ec918528e4..1d47736bac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,11 +20,11 @@ preadv_pwritev = []
 signalfd = []
 
 [dependencies]
-libc     = "0.1.12"
-bitflags = "0.3.2"
+libc     = "^0.1.12"
+bitflags = "^0.3.3"
 
 [dev-dependencies]
-rand = "0.3.8"
+rand = "^0.3.12"
 
 [dev-dependencies.nix-test]
 path    = "nix-test"