diff --git a/Cargo.lock b/Cargo.lock
index 234f52d1..c8d83d33 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1241,9 +1241,9 @@ dependencies = [
 
 [[package]]
 name = "ed25519-zebra"
-version = "4.0.2"
+version = "4.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e83e509bcd060ca4b54b72bde5bb306cb2088cb01e14797ebae90a24f70f5f7"
+checksum = "7d9ce6874da5d4415896cd45ffbc4d1cfc0c4f9c079427bd870742c30f2f65a9"
 dependencies = [
  "curve25519-dalek",
  "ed25519",
diff --git a/tower-batch-control/Cargo.toml b/tower-batch-control/Cargo.toml
index 897c81cc..b1421122 100644
--- a/tower-batch-control/Cargo.toml
+++ b/tower-batch-control/Cargo.toml
@@ -38,7 +38,7 @@ color-eyre = "0.6.2"
 # Enable a feature that makes tinyvec compile much faster.
 tinyvec = { version = "1.6.0", features = ["rustc_1_55"] }
 
-ed25519-zebra = "4.0.1"
+ed25519-zebra = "4.0.3"
 rand = "0.8.5"
 
 tokio = { version = "1.32.0", features = ["full", "tracing", "test-util"] }
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index cec170c7..ca35525b 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -106,7 +106,7 @@ itertools = "0.11.0"
 rayon = "1.7.0"
 
 # ZF deps
-ed25519-zebra = "4.0.1"
+ed25519-zebra = "4.0.3"
 redjubjub = "0.7.0"
 reddsa = "0.5.1"