diff --git a/examples/raft-kv-memstore-network-v2/Cargo.toml b/examples/raft-kv-memstore-network-v2/Cargo.toml
index ff1cc8279..adbda05e0 100644
--- a/examples/raft-kv-memstore-network-v2/Cargo.toml
+++ b/examples/raft-kv-memstore-network-v2/Cargo.toml
@@ -29,6 +29,7 @@ tracing-subscriber = { version = "0.3.0", features = ["env-filter"] }
 maplit = "1.0.2"
 
 [features]
+serde = []
 
 [package.metadata.docs.rs]
 all-features = true
diff --git a/examples/raft-kv-memstore-opendal-snapshot-data/Cargo.toml b/examples/raft-kv-memstore-opendal-snapshot-data/Cargo.toml
index 197708194..b1fa5d8e7 100644
--- a/examples/raft-kv-memstore-opendal-snapshot-data/Cargo.toml
+++ b/examples/raft-kv-memstore-opendal-snapshot-data/Cargo.toml
@@ -32,6 +32,7 @@ opendal = "0.48.0"
 maplit = "1.0.2"
 
 [features]
+serde = []
 
 [package.metadata.docs.rs]
 all-features = true
diff --git a/examples/raft-kv-memstore-singlethreaded/Cargo.toml b/examples/raft-kv-memstore-singlethreaded/Cargo.toml
index b13035ed2..1e9c3c1c9 100644
--- a/examples/raft-kv-memstore-singlethreaded/Cargo.toml
+++ b/examples/raft-kv-memstore-singlethreaded/Cargo.toml
@@ -32,6 +32,7 @@ tracing-subscriber = { version = "0.3.0", features = ["env-filter"] }
 maplit = "1.0.2"
 
 [features]
+serde = []
 
 [package.metadata.docs.rs]
 all-features = true
diff --git a/examples/raft-kv-memstore/Cargo.toml b/examples/raft-kv-memstore/Cargo.toml
index cb01f7a07..1ec880378 100644
--- a/examples/raft-kv-memstore/Cargo.toml
+++ b/examples/raft-kv-memstore/Cargo.toml
@@ -37,6 +37,7 @@ anyhow = "1.0.63"
 maplit = "1.0.2"
 
 [features]
+serde = []
 
 [package.metadata.docs.rs]
 all-features = true
diff --git a/examples/raft-kv-rocksdb/Cargo.toml b/examples/raft-kv-rocksdb/Cargo.toml
index 285ea16de..b5cbf01e3 100644
--- a/examples/raft-kv-rocksdb/Cargo.toml
+++ b/examples/raft-kv-rocksdb/Cargo.toml
@@ -48,6 +48,7 @@ tempfile = { version = "3.4.0" }
 
 
 [features]
+serde = []
 
 [package.metadata.docs.rs]
 all-features = true