diff --git a/Cargo.lock b/Cargo.lock
index 9fb27a6..ccd2267 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -49,7 +49,7 @@ dependencies = [
  "mime",
  "percent-encoding",
  "pin-project-lite 0.2.17",
- "rand 0.10.2",
+ "rand 0.10.3",
  "sha1 0.11.0",
  "smallvec",
  "tokio",
@@ -1431,7 +1431,7 @@ checksum = "9fb9654ba8355388abeb8dcb4fc62f511300867002afc858860463bdd9fe0c44"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
 ]
 
 [[package]]
@@ -2510,7 +2510,7 @@ dependencies = [
  "protox",
  "pyo3",
  "quickcheck",
- "rand 0.10.2",
+ "rand 0.10.3",
  "tide",
  "tokio",
 ]
@@ -2522,7 +2522,7 @@ dependencies = [
  "proc-macro2",
  "prometheus-client",
  "quote",
- "syn 3.0.5",
+ "syn 3.0.6",
  "trybuild",
 ]
 
@@ -2681,7 +2681,7 @@ checksum = "95c589f335db0f6aaa168a7cd27b1fc6920f5e1470c804f814d9cd6e62a0f70b"
 dependencies = [
  "env_logger",
  "log",
- "rand 0.10.2",
+ "rand 0.10.3",
 ]
 
 [[package]]
@@ -2731,9 +2731,9 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.10.2"
+version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7f5fa3a058cd35567ef9bfa5e75732bee0f9e4c55fa90477bef2dfcdbc4be80"
+checksum = "65c9fb96cbc91e3478eaae79a69fcd3f1ae4ad052e471fe6732fff548984b4af"
 dependencies = [
  "chacha20",
  "getrandom 0.4.2",
@@ -3316,9 +3316,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "3.0.5"
+version = "3.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12df2e0110f65b775f769bb17ef989067a1d931b2eb822bd4346631eeada89f9"
+checksum = "8593e8e72159ed2257d083c7a454a85cbf854f37a0966d8d483aff8c8a3ebcee"
 dependencies = [
  "proc-macro2",
  "quote",