diff --git a/Cargo.lock b/Cargo.lock
index e63dab8f..caf2fd5e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1702,9 +1702,9 @@ checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 
 [[package]]
 name = "smallvec"
-version = "1.4.0"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7cb5678e1615754284ec264d9bb5b4c27d2018577fd90ac0ceb578591ed5ee4"
+checksum = "3757cb9d89161a2f24e1cf78efa0c1fcff485d18e3f55e0aa3480824ddaa0f3f"
 dependencies = [
  "serde",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 0da12aab..066569cf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,6 +22,10 @@ path = "src/bin.rs"
 name = "managesieve"
 path = "src/managesieve.rs"
 
+#[[bin]]
+#name = "async"
+#path = "src/async.rs"
+
 [dependencies]
 xdg = "2.1.0"
 crossbeam = "0.7.2"
@@ -46,7 +50,7 @@ libc = {version = "0.2.59", features = ["extra_traits",]}
 rmp = "^0.8"
 rmpv = { version = "^0.4.2", features=["with-serde",] }
 rmp-serde = "^0.14.0"
-smallvec = { version = "1.1.0", features = ["serde", ] }
+smallvec = { version = "^1.4.0", features = ["serde", ] }
 bitflags = "1.0"
 pcre2 = { version = "0.2.3", optional = true }
 structopt = { version = "0.3.14", default-features = false }
diff --git a/melib/Cargo.toml b/melib/Cargo.toml
index 2c96f1af..aa2fa27b 100644
--- a/melib/Cargo.toml
+++ b/melib/Cargo.toml
@@ -37,7 +37,7 @@ unicode-segmentation = { version = "1.2.1", optional = true }
 libc = {version = "0.2.59", features = ["extra_traits",]}
 reqwest = { version ="0.10.0-alpha.2", optional=true, features = ["json", "blocking" ]}
 serde_json = { version = "1.0", optional = true, features = ["raw_value",] }
-smallvec = { version = "1.1.0", features = ["serde", ] }
+smallvec = { version = "^1.4.0", features = ["serde", ] }
 nix = "0.17.0"
 rusqlite = {version = "0.20.0", optional = true }
 
diff --git a/src/bin.rs b/src/bin.rs
index 83907c67..9fa35b9a 100644
--- a/src/bin.rs
+++ b/src/bin.rs
@@ -39,6 +39,7 @@ extern crate uuid;
 
 extern crate bitflags;
 extern crate serde_json;
+#[macro_use]
 extern crate smallvec;
 extern crate termion;