diff --git a/Cargo.lock b/Cargo.lock
index c747abaa..00c767bf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -172,7 +172,7 @@ dependencies = [
  "lazy_static",
  "log",
  "num_cpus",
- "parking_lot",
+ "parking_lot 0.10.0",
  "threadpool",
 ]
 
@@ -988,6 +988,15 @@ dependencies = [
  "autocfg 1.0.0",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61124eeebbd69b8190558df225adf7e4caafce0d743919e5d6b19652314ec5ec"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
 [[package]]
 name = "iovec"
 version = "0.1.4"
@@ -1090,6 +1099,15 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "lock_api"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a3c91c24eae6777794bb1997ad98bbb87daf92890acab859f7eaa4320333176"
+dependencies = [
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.8"
@@ -1291,8 +1309,19 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "92e98c49ab0b7ce5b222f2cc9193fc4efe11c6d0bd4f648e374684a6857b1cfc"
 dependencies = [
- "lock_api",
- "parking_lot_core",
+ "lock_api 0.3.4",
+ "parking_lot_core 0.7.0",
+]
+
+[[package]]
+name = "parking_lot"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d7744ac029df22dca6284efe4e898991d28e3085c706c972bcd7da4a27a15eb"
+dependencies = [
+ "instant",
+ "lock_api 0.4.3",
+ "parking_lot_core 0.8.2",
 ]
 
 [[package]]
@@ -1309,6 +1338,20 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
+[[package]]
+name = "parking_lot_core"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ccb628cad4f84851442432c60ad8e1f607e29752d0bf072cbd0baf28aa34272"
+dependencies = [
+ "cfg-if 1.0.0",
+ "instant",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.1.0"
@@ -1411,12 +1454,12 @@ dependencies = [
 
 [[package]]
 name = "r2d2"
-version = "0.8.8"
+version = "0.8.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1497e40855348e4a8a40767d8e55174bce1e445a3ac9254ad44ad468ee0485af"
+checksum = "545c5bc2b880973c9c10e4067418407a0ccaa3091781d1671d46eb35107cb26f"
 dependencies = [
  "log",
- "parking_lot",
+ "parking_lot 0.11.1",
  "scheduled-thread-pool",
 ]
 
@@ -1666,7 +1709,7 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f5de7bc31f28f8e6c28df5e1bf3d10610f5fdc14cc95f272853512c70a2bd779"
 dependencies = [
- "parking_lot",
+ "parking_lot 0.10.0",
 ]
 
 [[package]]