diff --git a/storage/blockchain/Cargo.toml b/storage/blockchain/Cargo.toml
index 6fd973cd..92b4374b 100644
--- a/storage/blockchain/Cargo.toml
+++ b/storage/blockchain/Cargo.toml
@@ -15,7 +15,7 @@ default     = ["heed"]
 heed        = ["cuprate-database/heed"]
 redb        = ["cuprate-database/redb"]
 redb-memory = ["cuprate-database/redb-memory"]
-serde       = ["dep:serde", "cuprate-database/serde", "cuprate-database-service/serde"]
+serde       = ["dep:serde", "cuprate-database/serde", "cuprate-database-service/serde", "cuprate-helper/serde"]
 
 [dependencies]
 cuprate-database         = { workspace = true }
diff --git a/storage/txpool/Cargo.toml b/storage/txpool/Cargo.toml
index c9082655..0fb43b24 100644
--- a/storage/txpool/Cargo.toml
+++ b/storage/txpool/Cargo.toml
@@ -15,7 +15,7 @@ default     = ["heed"]
 heed        = ["cuprate-database/heed"]
 redb        = ["cuprate-database/redb"]
 redb-memory = ["cuprate-database/redb-memory"]
-serde       = ["dep:serde", "cuprate-database/serde", "cuprate-database-service/serde"]
+serde       = ["dep:serde", "cuprate-database/serde", "cuprate-database-service/serde", "cuprate-helper/serde"]
 
 [dependencies]
 cuprate-database         = { workspace = true, features = ["heed"] }