diff --git a/Cargo.lock b/Cargo.lock
index 1941c01..61d7025 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "audit-filter"
 version = "0.5.0"
@@ -94,9 +96,9 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "0.4.4"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "501266b7edd0174f8530248f87f99c88fbe60ca4ef3dd486835b8d8d53136f7f"
+checksum = "4217ad341ebadf8d8e724e264f13e593e0648f5b3e94b3896a5df283be015ecc"
 
 [[package]]
 name = "lazy_static"
@@ -186,9 +188,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.68"
+version = "1.0.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f690853975602e1bfe1ccbf50504d67174e3bcf340f23b5ea9992e0587a52d8"
+checksum = "6ce777b7b150d76b9cf60d28b55f5847135a003f7d7350c6be7a773508ce7d45"
 dependencies = [
  "itoa",
  "ryu",
diff --git a/Cargo.toml b/Cargo.toml
index c4bcc85..1575aea 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -51,7 +51,7 @@ license = "MPL-2.0"
 travis-ci = { repository = "mozilla-services/audit-filter", branch = "master" }
 
 [dependencies]
-serde_json = "1.0.68"
+serde_json = "1.0.87"
 serde = "1.0.130"
 serde_derive = "1.0.87"
 docopt = "1.1.1"