diff --git a/Cargo.lock b/Cargo.lock
index abe3908f..a3a26479 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -81,9 +81,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "cipher"
-version = "0.5.0-pre.4"
+version = "0.5.0-pre.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "84fba98785cecd0e308818a87c817576a40f99d8bab6405bf422bacd3efb6c1f"
+checksum = "c71c893d5a1e8257048dbb29954d2e1f85f091a150304f1defe4ca2806da5d3f"
 dependencies = [
  "blobby",
  "crypto-common",
@@ -102,9 +102,9 @@ dependencies = [
 
 [[package]]
 name = "crypto-common"
-version = "0.2.0-pre.5"
+version = "0.2.0-rc.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7aa2ec04f5120b830272a481e8d9d8ba4dda140d2cda59b0f1110d5eb93c38e"
+checksum = "8c070b79a496dccd931229780ad5bbedd535ceff6c3565605a8e440e18e1aa2b"
 dependencies = [
  "hybrid-array",
 ]
@@ -130,9 +130,9 @@ checksum = "6fe2267d4ed49bc07b63801559be28c718ea06c4738b7a03c94df7386d2cde46"
 
 [[package]]
 name = "hybrid-array"
-version = "0.2.0-rc.5"
+version = "0.2.0-rc.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcda354500b318c287a6b91c1cfbc42edd53d52d259a80783ceb5e3986fca2b2"
+checksum = "4d306b679262030ad8813a82d4915fc04efff97776e4db7f8eb5137039d56400"
 dependencies = [
  "typenum",
 ]
@@ -146,9 +146,9 @@ dependencies = [
 
 [[package]]
 name = "inout"
-version = "0.2.0-pre.4"
+version = "0.2.0-rc.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a2cc35b920cc3b344af824e64e508ffc2c819fc2368ed4d253244446194d2fe"
+checksum = "bbc33218cf9ce7b927426ee4ad3501bcc5d8c26bf5fb4a82849a083715aca427"
 dependencies = [
  "hybrid-array",
 ]
diff --git a/aes/Cargo.toml b/aes/Cargo.toml
index 023b5996..2a45ef1b 100644
--- a/aes/Cargo.toml
+++ b/aes/Cargo.toml
@@ -14,14 +14,14 @@ categories = ["cryptography", "no-std"]
 
 [dependencies]
 cfg-if = "1"
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 zeroize = { version = "1.5.6", optional = true, default-features = false, features = ["aarch64"] }
 
 [target.'cfg(any(target_arch = "aarch64", target_arch = "x86_64", target_arch = "x86"))'.dependencies]
 cpufeatures = "0.2"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.3"
 
 [features]
diff --git a/aria/Cargo.toml b/aria/Cargo.toml
index 2c64fad5..2485e7a3 100644
--- a/aria/Cargo.toml
+++ b/aria/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "aria", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/belt-block/Cargo.toml b/belt-block/Cargo.toml
index 91a7374d..6a7324ff 100644
--- a/belt-block/Cargo.toml
+++ b/belt-block/Cargo.toml
@@ -12,10 +12,10 @@ repository = "https://github.com/RustCrypto/block-ciphers"
 keywords = ["crypto", "belt-block", "belt", "stb"]
 
 [dependencies]
-cipher = { version = "=0.5.0-pre.4", optional = true }
+cipher = { version = "=0.5.0-pre.6", optional = true }
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/blowfish/Cargo.toml b/blowfish/Cargo.toml
index e12c225c..35d68bee 100644
--- a/blowfish/Cargo.toml
+++ b/blowfish/Cargo.toml
@@ -13,11 +13,11 @@ keywords = ["crypto", "blowfish", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 byteorder = { version = "1.1", default-features = false }
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 
 [features]
 bcrypt = []
diff --git a/camellia/Cargo.toml b/camellia/Cargo.toml
index 7ac550e4..23acdedc 100644
--- a/camellia/Cargo.toml
+++ b/camellia/Cargo.toml
@@ -14,10 +14,10 @@ categories = ["cryptography", "no-std"]
 
 [dependencies]
 byteorder = { version = "1.1", default-features = false }
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 
 [features]
 zeroize = ["cipher/zeroize"]
diff --git a/cast5/Cargo.toml b/cast5/Cargo.toml
index 8fddddc7..85c83308 100644
--- a/cast5/Cargo.toml
+++ b/cast5/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "cast5", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/cast6/Cargo.toml b/cast6/Cargo.toml
index 45e73383..66818705 100644
--- a/cast6/Cargo.toml
+++ b/cast6/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "cast6", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/des/Cargo.toml b/des/Cargo.toml
index 0d154427..b75731da 100644
--- a/des/Cargo.toml
+++ b/des/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "des", "tdes", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 
 [features]
 zeroize = ["cipher/zeroize"]
diff --git a/idea/Cargo.toml b/idea/Cargo.toml
index 70bbe154..a05af49a 100644
--- a/idea/Cargo.toml
+++ b/idea/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "idea", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 
 [features]
 zeroize = ["cipher/zeroize"]
diff --git a/kuznyechik/Cargo.toml b/kuznyechik/Cargo.toml
index 67d6451e..7846f846 100644
--- a/kuznyechik/Cargo.toml
+++ b/kuznyechik/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "kuznyechik", "gost", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/magma/Cargo.toml b/magma/Cargo.toml
index 4001847c..7de67f34 100644
--- a/magma/Cargo.toml
+++ b/magma/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "magma", "gost", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/rc2/Cargo.toml b/rc2/Cargo.toml
index da835c01..c126af72 100644
--- a/rc2/Cargo.toml
+++ b/rc2/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "rc2", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 
 [features]
 zeroize = ["cipher/zeroize"]
diff --git a/rc2/tests/mod.rs b/rc2/tests/mod.rs
index b077d77f..5f8844dd 100644
--- a/rc2/tests/mod.rs
+++ b/rc2/tests/mod.rs
@@ -21,6 +21,7 @@ macro_rules! new_tests {
 }
 
 #[test]
+#[allow(deprecated)] // uses `clone_from_slice`
 fn rc2() {
     let tests = new_tests!("1", "2", "3", "7");
     for test in &tests {
@@ -37,6 +38,7 @@ fn rc2() {
 }
 
 #[test]
+#[allow(deprecated)] // uses `clone_from_slice`
 fn rc2_effective_key_64() {
     let tests = new_tests!("4", "5", "6");
     for test in &tests {
@@ -53,6 +55,7 @@ fn rc2_effective_key_64() {
 }
 
 #[test]
+#[allow(deprecated)] // uses `clone_from_slice`
 fn rc2_effective_key_129() {
     let tests = new_tests!("8");
     for test in &tests {
diff --git a/rc5/Cargo.toml b/rc5/Cargo.toml
index a0458d41..bb863b89 100644
--- a/rc5/Cargo.toml
+++ b/rc5/Cargo.toml
@@ -12,10 +12,10 @@ keywords = ["crypto", "rc5", "block-cipher"]
 categories = ["cryptography"]
 
 [dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["zeroize"] }
+cipher = { version = "=0.5.0-pre.6", features = ["zeroize"] }
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 
 [features]
 zeroize = []
diff --git a/rc5/tests/mod.rs b/rc5/tests/mod.rs
index 034b8378..f17416ed 100644
--- a/rc5/tests/mod.rs
+++ b/rc5/tests/mod.rs
@@ -1,5 +1,6 @@
 /// generated using the code in: https://www.ietf.org/archive/id/draft-krovetz-rc6-rc5-vectors-00.txt
 #[cfg(test)]
+#[allow(deprecated)] // uses `clone_from_slice`
 mod tests {
     use cipher::consts::*;
     use cipher::{array::Array, BlockCipherDecrypt, BlockCipherEncrypt, KeyInit};
diff --git a/serpent/Cargo.toml b/serpent/Cargo.toml
index df861418..8536fa98 100644
--- a/serpent/Cargo.toml
+++ b/serpent/Cargo.toml
@@ -14,10 +14,10 @@ categories = ["cryptography", "no-std"]
 
 [dependencies]
 byteorder = { version = "1.1", default-features = false }
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 
 [features]
 zeroize = ["cipher/zeroize"]
diff --git a/sm4/Cargo.toml b/sm4/Cargo.toml
index 793b0338..136ecc9e 100644
--- a/sm4/Cargo.toml
+++ b/sm4/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "sm4", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]
diff --git a/speck/Cargo.toml b/speck/Cargo.toml
index 8a5f6c7e..90229a6f 100644
--- a/speck/Cargo.toml
+++ b/speck/Cargo.toml
@@ -13,8 +13,8 @@ keywords = ["crypto", "speck", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.4"
diff --git a/threefish/Cargo.toml b/threefish/Cargo.toml
index 397f86cf..653ea214 100644
--- a/threefish/Cargo.toml
+++ b/threefish/Cargo.toml
@@ -13,11 +13,11 @@ keywords = ["crypto", "threefish", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = { version = "=0.5.0-pre.4", optional = true }
+cipher = { version = "=0.5.0-pre.6", optional = true }
 zeroize = { version = "1.6", optional = true, default-features = false }
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"]}
+cipher = { version = "=0.5.0-pre.6", features = ["dev"]}
 hex-literal = "0.4"
 
 [features]
diff --git a/threefish/tests/mod.rs b/threefish/tests/mod.rs
index 6b357600..7238e1e4 100644
--- a/threefish/tests/mod.rs
+++ b/threefish/tests/mod.rs
@@ -15,6 +15,7 @@ struct Vector {
 macro_rules! impl_test {
     {$name:ident, $cipher:ty, $tests:expr,} => {
         #[test]
+        #[allow(deprecated)] // uses `clone_from_slice`
         fn $name() {
             let vectors = $tests;
             for &Vector { key, tweak, pt, ct } in vectors.iter() {
diff --git a/twofish/Cargo.toml b/twofish/Cargo.toml
index 7ae94435..885c69cb 100644
--- a/twofish/Cargo.toml
+++ b/twofish/Cargo.toml
@@ -13,10 +13,10 @@ keywords = ["crypto", "twofish", "block-cipher"]
 categories = ["cryptography", "no-std"]
 
 [dependencies]
-cipher = "=0.5.0-pre.4"
+cipher = "=0.5.0-pre.6"
 
 [dev-dependencies]
-cipher = { version = "=0.5.0-pre.4", features = ["dev"] }
+cipher = { version = "=0.5.0-pre.6", features = ["dev"] }
 hex-literal = "0.4"
 
 [features]