diff --git a/Cargo.lock b/Cargo.lock
index b5599a0..e6909e2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,8 +8,8 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94d1988118c887f61418940e322d574e8a2dd67165f1f1556eaae22e4019c6af"
 dependencies = [
- "block-buffer",
- "digest",
+ "block-buffer 0.9.0",
+ "digest 0.9.0",
  "ppv-lite86",
 ]
 
@@ -23,6 +23,15 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "block-padding"
 version = "0.2.1"
@@ -44,6 +53,16 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "crypto-common"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "digest"
 version = "0.9.0"
@@ -53,6 +72,16 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer 0.10.4",
+ "crypto-common",
+]
+
 [[package]]
 name = "generic-array"
 version = "0.14.4"
@@ -65,13 +94,11 @@ dependencies = [
 
 [[package]]
 name = "groestl"
-version = "0.9.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2432787a9b8f0d58dca43fe2240399479b7582dc8afa2126dc7652b864029e47"
+checksum = "343cfc165f92a988fd60292f7a0bfde4352a5a0beff9fbec29251ca4e9676e4d"
 dependencies = [
- "block-buffer",
- "digest",
- "opaque-debug",
+ "digest 0.10.7",
 ]
 
 [[package]]
@@ -86,7 +113,7 @@ version = "0.2.6"
 dependencies = [
  "blake-hash",
  "byteorder",
- "digest",
+ "digest 0.9.0",
  "groestl",
  "sha3",
  "skein-hash",
@@ -110,8 +137,8 @@ version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f81199417d4e5de3f04b1e871023acea7389672c4135918f05aa9cbf2f2fa809"
 dependencies = [
- "block-buffer",
- "digest",
+ "block-buffer 0.9.0",
+ "digest 0.9.0",
  "keccak",
  "opaque-debug",
 ]
@@ -122,8 +149,8 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5726f8a6133ac5f2fc62f3b0f132e85341623e9a7d3740d1092f15a1fa5d2a62"
 dependencies = [
- "block-buffer",
- "digest",
+ "block-buffer 0.9.0",
+ "digest 0.9.0",
  "threefish-cipher",
 ]
 
@@ -138,9 +165,9 @@ dependencies = [
 
 [[package]]
 name = "typenum"
-version = "1.12.0"
+version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
+checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
 
 [[package]]
 name = "version_check"
diff --git a/Cargo.toml b/Cargo.toml
index 1f26047..c097c21 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,7 @@ keywords = ["lyra2", "Lyra2RE", "Lyra2REv2", "Lyra2REv3"]
 [dependencies]
 sha3 = "0.9.1"
 blake-hash = "0.4.1"
-groestl = "0.9.0"
+groestl = "0.10.1"
 byteorder = { version = "1.3.4", default-features = false }
 skein-hash = "0.3.1"
 digest = "0.9.0"
diff --git a/src/lyra2re.rs b/src/lyra2re.rs
index 7f37095..6470afa 100644
--- a/src/lyra2re.rs
+++ b/src/lyra2re.rs
@@ -3,7 +3,8 @@
 //! `lyra2re` crate has necessary formulas to calculate `lyra2re`.
 use crate::lyra2;
 use digest::generic_array::typenum::U32;
-use blake_hash::Digest;
+use blake_hash::Digest as BlakeDigest;
+use groestl::Digest;
 
 /// Returns the calculation result of lyra2re.
 /// # Examples
@@ -30,7 +31,7 @@ pub fn sum(input: Vec<u8>) -> Vec<u8> {
 
     let result_skein = skein_hash::Skein512::<U32>::digest(&result_lyra2);
 
-    groestl::Groestl256::digest(&result_skein).to_vec()
+    groestl::Groestl256::digest(result_skein).to_vec()
 }
 
 #[test]