diff --git a/Cargo.toml b/Cargo.toml
index 3ac99e7..f2d638d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,10 +13,10 @@ categories = ["command-line-utilities"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-anyhow = "*"
-chrono = "*"
-chrono-tz = "*"
+anyhow = "^1"
+chrono = "^0.4"
+chrono-tz = "^0.10"
 clap = {version= "3", features=["cargo", "derive"]}
-confy = "*"
-prettytable-rs = "*"
-serde = { version = "*", features = ["derive"] }
+confy = "^0.6"
+prettytable-rs = "^0.10"
+serde = { version = "^1", features = ["derive"] }