diff --git a/Cargo.lock b/Cargo.lock
index 40a5f14..17d4987 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -123,11 +123,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "bayard"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
- "bayard-client 0.7.0",
+ "bayard-client 0.7.1",
  "bayard-proto 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "bayard-server 0.7.0",
+ "bayard-server 0.7.1",
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-channel 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ctrlc 3.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -142,10 +142,10 @@ dependencies = [
 
 [[package]]
 name = "bayard-client"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
  "bayard-proto 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "bayard-server 0.7.0",
+ "bayard-server 0.7.1",
  "bincode 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "grpcio 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -168,9 +168,9 @@ dependencies = [
 
 [[package]]
 name = "bayard-rest"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
- "bayard-client 0.7.0",
+ "bayard-client 0.7.1",
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "iron 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -184,7 +184,7 @@ dependencies = [
 
 [[package]]
 name = "bayard-server"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
  "async-std 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bayard-proto 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -196,10 +196,10 @@ dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lindera-tantivy 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "prometheus 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prometheus 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "protobuf 2.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "raft 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "rocksdb 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rocksdb 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.106 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.51 (registry+https://github.com/rust-lang/crates.io-index)",
  "stringreader 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -992,7 +992,7 @@ dependencies = [
 
 [[package]]
 name = "librocksdb-sys"
-version = "6.6.4"
+version = "6.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bindgen 0.53.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1418,15 +1418,15 @@ dependencies = [
 
 [[package]]
 name = "prometheus"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "protobuf 2.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "quick-error 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thiserror 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1682,11 +1682,11 @@ dependencies = [
 
 [[package]]
 name = "rocksdb"
-version = "0.13.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)",
- "librocksdb-sys 6.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "librocksdb-sys 6.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1943,6 +1943,24 @@ dependencies = [
  "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "thiserror"
+version = "1.0.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "thiserror-impl 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "thread_local"
 version = "1.0.1"
@@ -2250,7 +2268,7 @@ dependencies = [
 "checksum levenshtein_automata 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "73a004f877f468548d8d0ac4977456a249d8fabbdb8416c36db163dfc8f2e8ca"
 "checksum libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)" = "99e85c08494b21a9054e7fe1374a732aeadaff3980b6990b94bfd3a70f690005"
 "checksum libloading 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f2b111a074963af1d37a139918ac6d49ad1d0d5e47f72fd55388619691a7d753"
-"checksum librocksdb-sys 6.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4e3b727e2dd20ec2fb7ed93f23d9fd5328a0871185485ebdaff007b47d3e27e4"
+"checksum librocksdb-sys 6.7.4 (registry+https://github.com/rust-lang/crates.io-index)" = "883213ae3d09bfc3d104aefe94b25ebb183b6f4d3a515b23b14817e1f4854005"
 "checksum lindera 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5555a845a4fea0530a684186d8728614516ee8124ef66ac9f5dbfd6aa19eef0c"
 "checksum lindera-core 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "84cc6a12fb246b0b3eac731cc5e269dc7f6b606b4f15124de43fe90dc130a5b3"
 "checksum lindera-dictionary 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "fe764c1bda2eab7f35a1885019fbe2c4b2af4d7adc4e613f753dbcef3612b451"
@@ -2299,7 +2317,7 @@ dependencies = [
 "checksum proc-macro-hack 0.5.15 (registry+https://github.com/rust-lang/crates.io-index)" = "0d659fe7c6d27f25e9d80a1a094c223f5246f6a6596453e09d7229bf42750b63"
 "checksum proc-macro-nested 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8e946095f9d3ed29ec38de908c22f95d9ac008e424c7bcae54c75a79c527c694"
 "checksum proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)" = "df246d292ff63439fea9bc8c0a270bed0e390d5ebd4db4ba15aba81111b5abe3"
-"checksum prometheus 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5567486d5778e2c6455b1b90ff1c558f29e751fc018130fa182e15828e728af1"
+"checksum prometheus 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b0575e258dab62268e7236d7307caa38848acbda7ec7ab87bd9093791e999d20"
 "checksum protobuf 2.14.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8e86d370532557ae7573551a1ec8235a0f8d6cb276c7c9e6aa490b511c447485"
 "checksum quick-error 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
 "checksum quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2bdc6c187c65bca4260c9011c9e3132efe4909da44726bad24cf7572ae338d7f"
@@ -2328,7 +2346,7 @@ dependencies = [
 "checksum regex-syntax 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "8e931c58b93d86f080c734bfd2bce7dd0079ae2331235818133c8be7f422e20e"
 "checksum regex-syntax 0.6.17 (registry+https://github.com/rust-lang/crates.io-index)" = "7fe5bd57d1d7414c6b5ed48563a2c855d995ff777729dcd91c369ec7fea395ae"
 "checksum remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
-"checksum rocksdb 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "12069b106981c6103d3eab7dd1c86751482d0779a520b7c14954c8b586c1e643"
+"checksum rocksdb 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)" = "61aa17a99a2413cd71c1106691bf59dad7de0cd5099127f90e9d99c429c40d4a"
 "checksum route-recognizer 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "ea509065eb0b3c446acdd0102f0d46567dc30902dc0be91d6552035d92b0f4f8"
 "checksum router 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "dc63b6f3b8895b0d04e816b2b1aa58fdba2d5acca3cbb8f0ab8e017347d57397"
 "checksum rust-stemmers 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e46a2036019fdb888131db7a4c847a1063a7493f971ed94ea82c67eada63ca54"
@@ -2359,6 +2377,8 @@ dependencies = [
 "checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
 "checksum termcolor 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bb6bfa289a4d7c5766392812c0a1f4c1ba45afa1ad47803c11e1f407d846d75f"
 "checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+"checksum thiserror 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)" = "d12a1dae4add0f0d568eebc7bf142f145ba1aa2544cafb195c76f0f409091b60"
+"checksum thiserror-impl 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)" = "3f34e0c1caaa462fd840ec6b768946ea1e7842620d94fe29d5b847138f521269"
 "checksum thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
 "checksum time 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)" = "ca8a50ef2360fbd1eeb0ecd46795a87a19024eb4b53c5dc916ca1fd95fe62438"
 "checksum traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "efd1f82c56340fdf16f2a953d7bda4f8fdffba13d93b00844c25572110b26079"
diff --git a/bayard-client/Cargo.toml b/bayard-client/Cargo.toml
index 65bbbfc..a05bd45 100644
--- a/bayard-client/Cargo.toml
+++ b/bayard-client/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bayard-client"
-version = "0.7.0"
+version = "0.7.1"
 authors = ["Minoru Osuka <minoru.osuka@gmail.com>"]
 edition = "2018"
 description = "Client library for Bayard."
@@ -18,8 +18,8 @@ grpcio = { version = "0.4.7", features = [ "secure" ] }
 log = "0.4.8"
 protobuf = "2.14.0"
 raft = "0.4.3"
-rand = "0.7.2"
-serde_json = "1.0.44"
+rand = "0.7.3"
+serde_json = "1.0.51"
 
 bayard-proto = "0.7.0"
-bayard-server = { version = "0.7.0", path = "../bayard-server" }
+bayard-server = { version = "0.7.1", path = "../bayard-server" }
diff --git a/bayard-rest/Cargo.toml b/bayard-rest/Cargo.toml
index f7842f4..c4fd229 100644
--- a/bayard-rest/Cargo.toml
+++ b/bayard-rest/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bayard-rest"
-version = "0.7.0"
+version = "0.7.1"
 authors = ["Minoru Osuka <minoru.osuka@gmail.com>"]
 edition = "2018"
 description = "REST API server for Bayard."
@@ -24,7 +24,7 @@ log = "0.4.8"
 logger = "0.4.0"
 persistent = "0.4.0"
 router = "0.6.0"
-serde_json = "1.0.44"
+serde_json = "1.0.51"
 urlencoded = "0.6.0"
 
 bayard-client = { version = "0.7.0", path = "../bayard-client" }
diff --git a/bayard-server/Cargo.toml b/bayard-server/Cargo.toml
index 7fa5379..1d25b4d 100644
--- a/bayard-server/Cargo.toml
+++ b/bayard-server/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bayard-server"
-version = "0.7.0"
+version = "0.7.1"
 authors = ["MinoruOsuka <minoru.osuka@gmail.com>"]
 edition = "2018"
 description = "Bayard is a distributed search server."
@@ -13,7 +13,7 @@ categories = ["database"]
 license = "MIT"
 
 [dependencies]
-async-std = "1.4.0"
+async-std = "1.5.0"
 bincode = "1.2.1"
 cang-jie = "0.7.0"
 futures = "0.1.29"
@@ -22,12 +22,12 @@ jieba-rs = "0.4.10"
 lazy_static = "1.4.0"
 lindera-tantivy = "0.1.0"
 log = "0.4.8"
-prometheus = "0.7.0"
+prometheus = "0.8.0"
 protobuf = "2.14.0"
 raft = "0.4.3"
-rocksdb = "0.13.0"
-serde = { version = "1.0.104", features = ["derive"] }
-serde_json = "1.0.44"
+rocksdb = "0.14.0"
+serde = { version = "1.0.106", features = ["derive"] }
+serde_json = "1.0.51"
 stringreader = "0.1.1"
 tantivy = "0.12.0"
 
diff --git a/bayard/Cargo.toml b/bayard/Cargo.toml
index 10e1211..2ffd231 100644
--- a/bayard/Cargo.toml
+++ b/bayard/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bayard"
-version = "0.7.0"
+version = "0.7.1"
 authors = ["Minoru Osuka <minoru.osuka@gmail.com>"]
 edition = "2018"
 description = "Bayard is a distributed search server."
@@ -18,16 +18,16 @@ path = "src/main.rs"
 
 [dependencies]
 clap = "2.33.0"
-crossbeam-channel = "0.4.0"
-ctrlc = { version = "3.1.3", features = ["termination"] }
+crossbeam-channel = "0.4.2"
+ctrlc = { version = "3.1.4", features = ["termination"] }
 env_logger = "0.7.1"
 futures = "0.1.29"
 grpcio = { version = "0.4.7", features = [ "secure" ] }
 log = "0.4.8"
-num_cpus = "1.11.1"
+num_cpus = "1.13.0"
 raft = "0.4.3"
-serde_json = "1.0.44"
+serde_json = "1.0.51"
 
-bayard-client = { version = "0.7.0", path = "../bayard-client" }
+bayard-client = { version = "0.7.1", path = "../bayard-client" }
 bayard-proto = "0.7.0"
-bayard-server = { version = "0.7.0", path = "../bayard-server" }
+bayard-server = { version = "0.7.1", path = "../bayard-server" }