diff --git a/actix/Cargo.lock b/actix/Cargo.lock
index d961ad70..f06a5405 100644
--- a/actix/Cargo.lock
+++ b/actix/Cargo.lock
@@ -712,6 +712,12 @@ dependencies = [
  "cfg-if 0.1.10",
 ]
 
+[[package]]
+name = "maybe-uninit"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
+
 [[package]]
 name = "memchr"
 version = "2.2.1"
@@ -900,7 +906,7 @@ dependencies = [
  "libc",
  "rand 0.6.5",
  "rustc_version",
- "smallvec 0.6.10",
+ "smallvec 0.6.14",
  "winapi 0.3.8",
 ]
 
@@ -915,7 +921,7 @@ dependencies = [
  "libc",
  "redox_syscall 0.1.56",
  "rustc_version",
- "smallvec 0.6.10",
+ "smallvec 0.6.14",
  "winapi 0.3.8",
 ]
 
@@ -1388,9 +1394,12 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "0.6.10"
+version = "0.6.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab606a9c5e214920bb66c458cd7be8ef094f813f20fe77a54cc7dbfff220d4b7"
+checksum = "b97fcaeba89edba30f044a10c6a3cc39df9c3f17d7cd829dd1446cab35f890e0"
+dependencies = [
+ "maybe-uninit",
+]
 
 [[package]]
 name = "smallvec"