diff --git a/example-service/Cargo.toml b/example-service/Cargo.toml
index 02a5677..846b3e1 100644
--- a/example-service/Cargo.toml
+++ b/example-service/Cargo.toml
@@ -13,14 +13,14 @@ readme = "../README.md"
 description = "An example server built on tarpc."
 
 [dependencies]
-clap = "2.0"
+clap = "2.33"
+env_logger = "0.8"
 futures = "0.3"
 serde = { version = "1.0" }
 tarpc = { version = "0.22", path = "../tarpc", features = ["full"] }
 tokio = { version = "0.3", features = ["full"] }
 tokio-serde = { version = "0.6", features = ["json"] }
 tokio-util = { version = "0.4", features = ["codec"] }
-env_logger = "0.6"
 
 [lib]
 name = "service"
diff --git a/plugins/Cargo.toml b/plugins/Cargo.toml
index 8f4de1b..a059c3d 100644
--- a/plugins/Cargo.toml
+++ b/plugins/Cargo.toml
@@ -19,15 +19,15 @@ serde1 = []
 travis-ci = { repository = "google/tarpc" }
 
 [dependencies]
-syn = { version = "1.0.11", features = ["full"] }
-quote = "1.0.2"
-proc-macro2 = "1.0.6"
+proc-macro2 = "1.0"
+quote = "1.0"
+syn = { version = "1.0", features = ["full"] }
 
 [lib]
 proc-macro = true
 
 [dev-dependencies]
+assert-type-eq = "0.1.0"
 futures = "0.3"
 serde = { version = "1.0", features = ["derive"] }
 tarpc = { path = "../tarpc" }
-assert-type-eq = "0.1.0"
diff --git a/tarpc/Cargo.toml b/tarpc/Cargo.toml
index 4c43f4e..3578484 100644
--- a/tarpc/Cargo.toml
+++ b/tarpc/Cargo.toml
@@ -29,9 +29,9 @@ travis-ci = { repository = "google/tarpc" }
 anyhow = "1.0"
 fnv = "1.0"
 futures = "0.3"
-humantime = "1.0"
+humantime = "2.0"
 log = "0.4"
-pin-project = "0.4.17"
+pin-project = "1.0"
 rand = "0.7"
 serde = { optional = true, version = "1.0", features = ["derive"] }
 static_assertions = "1.1.0"
@@ -41,13 +41,11 @@ tokio-util = { optional = true, version = "0.4" }
 tokio-serde = { optional = true, version = "0.6" }
 
 [dev-dependencies]
-assert_matches = "1.0"
+assert_matches = "1.4"
 bincode = "1.3"
 bytes = { version = "0.5", features = ["serde"] }
-env_logger = "0.6"
-flate2 = "1.0.16"
-futures = "0.3"
-humantime = "1.0"
+env_logger = "0.8"
+flate2 = "1.0"
 log = "0.4"
 pin-utils = "0.1.0-alpha"
 serde_bytes = "0.11"