diff --git a/Cargo.lock b/Cargo.lock
index 557f729bd73a14f714a74f6bdbd5ab780b268f9e..48812ba6e76fe3f6ea9fae2809da78723767c5ae 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -959,7 +959,6 @@ dependencies = [
  "durs-dbs-tools 0.1.0-a",
  "durs-module 0.3.0-dev",
  "durs-wot 0.8.0-a0.9",
- "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "maplit 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "mockall 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -988,7 +987,6 @@ dependencies = [
  "durs-dbs-tools 0.1.0-a",
  "durs-module 0.3.0-dev",
  "durs-wot 0.8.0-a0.9",
- "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1066,7 +1064,6 @@ dependencies = [
  "bincode 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "durs-common-tools 0.2.0",
  "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rkv 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustbreak 2.0.0-rc3 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/lib/modules-lib/bc-db-reader/Cargo.toml b/lib/modules-lib/bc-db-reader/Cargo.toml
index 1084dd8b99fd17dc0398d01022b6edf4afb5f091..f5b82d028b8bb26677b4d94a72479af3feb99e16 100644
--- a/lib/modules-lib/bc-db-reader/Cargo.toml
+++ b/lib/modules-lib/bc-db-reader/Cargo.toml
@@ -24,7 +24,6 @@ durs-wot = { path = "../../dubp/wot" }
 log = "0.4.*"
 maplit = "1.0.1"
 mockall = { version = "0.5.2", optional = true }
-fnv = "1.0.6"
 serde = { version = "1.0.*", features = ["derive"] }
 unwrap = "1.2.1"
 
diff --git a/lib/modules/blockchain/bc-db-writer/Cargo.toml b/lib/modules/blockchain/bc-db-writer/Cargo.toml
index 7b7ded536a453decea18df0673c328ddb5688d5d..c530fd5bb3f7e706f8957f41ee0b671fe06cd173 100644
--- a/lib/modules/blockchain/bc-db-writer/Cargo.toml
+++ b/lib/modules/blockchain/bc-db-writer/Cargo.toml
@@ -22,7 +22,6 @@ durs-conf = { path = "../../../core/conf" }
 durs-dbs-tools = { path = "../../../tools/dbs-tools" }
 durs-module = { path = "../../../core/module" }
 durs-wot = { path = "../../../dubp/wot" }
-fnv = "1.0.6"
 log = "0.4.*"
 serde = "1.0.*"
 serde_derive = "1.0.*"
diff --git a/lib/tools/dbs-tools/Cargo.toml b/lib/tools/dbs-tools/Cargo.toml
index 299777d9010fc4f5d2cbc4205751f65a2e17cf08..23e5bdc3259e7adebccee0b9b4b352a5904c9d09 100644
--- a/lib/tools/dbs-tools/Cargo.toml
+++ b/lib/tools/dbs-tools/Cargo.toml
@@ -13,7 +13,6 @@ path = "src/lib.rs"
 bincode = "1.2.0"
 durs-common-tools = { path = "../common-tools" }
 failure = "0.1.5"
-fnv = "1.0.6"
 log = "0.4.*"
 rkv = "0.10.2"
 rustbreak = {version = "2.0.0-rc3", features = ["bin_enc"]}