diff --git a/Cargo.lock b/Cargo.lock
index 31e54ef9c..81ef8c90a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3347,9 +3347,9 @@ dependencies = [
 
 [[package]]
 name = "prost"
-version = "0.10.2"
+version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c9e8715f12cd0fed93db938fdca5d5c65694fd662c30ee75a09ab156f445f51"
+checksum = "bc03e116981ff7d8da8e5c220e374587b98d294af7ba7dd7fda761158f00086f"
 dependencies = [
  "bytes",
  "prost-derive",
diff --git a/zebrad/Cargo.toml b/zebrad/Cargo.toml
index 3fa14cd6d..4e0ac2417 100644
--- a/zebrad/Cargo.toml
+++ b/zebrad/Cargo.toml
@@ -74,7 +74,7 @@ vergen = { version = "7.0.0", default-features = false, features = ["cargo", "gi
 abscissa_core = { version = "0.5", features = ["testing"] }
 hex = "0.4.3"
 once_cell = "1.10.0"
-prost = "0.10.2"
+prost = "0.10.3"
 regex = "1.5.5"
 reqwest = "0.11"
 semver = "1.0.9"