diff --git a/Cargo.toml b/Cargo.toml
index e78bf269..8cd337e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,13 +13,13 @@ edition = "2018"
 [dependencies]
 parking_lot_core = { path = "core", version = "0.7.1" }
 lock_api = { path = "lock_api", version = "0.3.4" }
-instant = "0.1"
+instant = "0.1.4"
 
 [dev-dependencies]
-rand = "0.7"
+rand = "0.7.3"
 
 # Used when testing out serde support.
-bincode = {version = "1.1.3"}
+bincode = "1.3.0"
 
 [features]
 default = []
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 76de2a4f..d3cbb312 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -10,24 +10,24 @@ categories = ["concurrency"]
 edition = "2018"
 
 [dependencies]
-cfg-if = "0.1.5"
-smallvec = "1.0"
-petgraph = { version = "0.5", optional = true }
-thread-id = { version = "3.2.0", optional = true }
-backtrace = { version = "0.3.2", optional = true }
-instant = "0.1"
+cfg-if = "0.1.10"
+smallvec = "1.4.0"
+petgraph = { version = "0.5.1", optional = true }
+thread-id = { version = "3.3.0", optional = true }
+backtrace = { version = "0.3.49", optional = true }
+instant = "0.1.4"
 
 [target.'cfg(unix)'.dependencies]
-libc = "0.2.55"
+libc = "0.2.71"
 
 [target.'cfg(target_os = "redox")'.dependencies]
-redox_syscall = "0.1"
+redox_syscall = "0.1.56"
 
 [target.'cfg(target_os = "cloudabi")'.dependencies]
-cloudabi = "0.1"
+cloudabi = "0.1.0"
 
 [target.'cfg(windows)'.dependencies]
-winapi = { version = "0.3", features = ["winnt", "ntstatus", "minwindef",
+winapi = { version = "0.3.8", features = ["winnt", "ntstatus", "minwindef",
     "winerror", "winbase", "errhandlingapi", "handleapi"] }
 
 [features]
diff --git a/lock_api/Cargo.toml b/lock_api/Cargo.toml
index eac455f2..f75dba18 100644
--- a/lock_api/Cargo.toml
+++ b/lock_api/Cargo.toml
@@ -10,13 +10,13 @@ categories = ["concurrency", "no-std"]
 edition = "2018"
 
 [dependencies]
-scopeguard = { version = "1.0", default-features = false }
-owning_ref = { version = "0.4", optional = true }
+scopeguard = { version = "1.1.0", default-features = false }
+owning_ref = { version = "0.4.1", optional = true }
 
 # Optional dependency for supporting serde.  Optional crates automatically
 # create a feature with the same name as the crate, so if you need serde
 # support, just pass "--features serde" when building this crate.
-serde = {version = "1.0.90", default-features = false, optional = true}
+serde = { version = "1.0.114", default-features = false, optional = true }
 
 [features]
 nightly = []