diff --git a/Cargo.lock b/Cargo.lock
index ebb406c6..b1281525 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1779,9 +1779,9 @@ checksum = "0bfe8eed0a9285ef776bb792479ea3834e8b94e13d615c2f66d03dd50a435a29"
 
 [[package]]
 name = "httparse"
-version = "1.6.0"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9100414882e15fb7feccb4897e5f0ff0ff1ca7d1a86a23208ada4d7a18e6c6c4"
+checksum = "d897f394bad6a705d5f4104762e116a75639e470d80901eed05a860a95cb1904"
 
 [[package]]
 name = "httpdate"
@@ -1807,9 +1807,9 @@ dependencies = [
 
 [[package]]
 name = "hyper"
-version = "0.14.20"
+version = "0.14.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02c929dc5c39e335a03c405292728118860721b10190d98c2a0f0efd5baafbac"
+checksum = "41a2df176f359a22aee9c8657e674f7aa54e9ba48b512a798e5ca36a1f51065c"
 dependencies = [
  "bytes",
  "futures-channel",
diff --git a/zebra-rpc/Cargo.toml b/zebra-rpc/Cargo.toml
index 635eee13..8d8eca6f 100644
--- a/zebra-rpc/Cargo.toml
+++ b/zebra-rpc/Cargo.toml
@@ -17,7 +17,7 @@ chrono = { version = "0.4.22", default-features = false, features = ["clock", "s
 futures = "0.3.25"
 
 # lightwalletd sends JSON-RPC requests over HTTP 1.1
-hyper = { version = "0.14.20", features = ["http1", "server"] }
+hyper = { version = "0.14.21", features = ["http1", "server"] }
 
 jsonrpc-core = "18.0.0"
 jsonrpc-derive = "18.0.0"
diff --git a/zebrad/Cargo.toml b/zebrad/Cargo.toml
index 0d666048..6d8e5143 100644
--- a/zebrad/Cargo.toml
+++ b/zebrad/Cargo.toml
@@ -125,7 +125,7 @@ inferno = { version = "0.11.12", default-features = false, optional = true }
 tracing-journald = { version = "0.3.0", optional = true }
 
 # prod feature filter-reload
-hyper = { version = "0.14.20", features = ["http1", "http2", "server"], optional = true }
+hyper = { version = "0.14.21", features = ["http1", "http2", "server"], optional = true }
 
 # prod feature prometheus
 metrics-exporter-prometheus = { version = "0.11.0", default-features = false, features = ["http-listener"], optional = true }
@@ -160,7 +160,7 @@ semver = "1.0.14"
 serde_json = { version = "1.0.87", features = ["preserve_order"] }
 tempfile = "3.3.0"
 
-hyper = { version = "0.14.20", features = ["http1", "http2", "server"]}
+hyper = { version = "0.14.21", features = ["http1", "http2", "server"]}
 reqwest = "0.11.12"
 
 tokio = { version = "1.21.2", features = ["full", "tracing", "test-util"] }