diff --git a/Cargo.toml b/Cargo.toml
index c953b6c9..b7af1031 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,14 +13,14 @@ edition = "2018"
 [dependencies]
 aes = { version = "0.7.5", optional = true }
 byteorder = "1.3"
-bzip2 = { version = "0.4", optional = true }
+bzip2 = { version = "0.4.3", optional = true }
 constant_time_eq = { version = "0.1.5", optional = true }
 crc32fast = "1.1.1"
-flate2 = { version = "1.0.0", default-features = false, optional = true }
-hmac = { version = "0.12.0", optional = true, features = ["reset"] }
+flate2 = { version = "1.0.13", default-features = false, optional = true }
+hmac = { version = "0.12.1", optional = true, features = ["reset"] }
 pbkdf2 = {version = "0.10.0", optional = true }
 sha1 = {version = "0.10.0", optional = true }
-time = { version = "0.3", features = ["formatting", "macros" ], optional = true }
+time = { version = "0.3.1", features = ["formatting", "macros" ], optional = true }
 zstd = { version = "0.10", optional = true }
 
 [dev-dependencies]