diff --git a/Cargo.toml b/Cargo.toml
index 33cfaf2..46c6c54 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,12 +12,12 @@ keywords = ["byte", "byte-size", "utility", "human-readable", "format"]
 license = "Apache-2.0"
 
 [dependencies]
-serde = { version = "1.0", optional = true }
+serde = { version = "1.0.185", optional = true }
 
 [dev-dependencies]
-serde = { version = "1.0", features = ["derive"] }
-serde_json = "1.0"
-toml = "0.5"
+serde = { version = "1.0.185", features = ["derive"] }
+serde_json = "1.0.105"
+toml = "0.7.6"
 
 [features]
 default = []