diff --git a/Cargo.lock b/Cargo.lock
index 920a28e..f80ca3b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -222,6 +222,15 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bf7fe51849ea569fd452f37822f606a5cabb684dc918707a0193fd4664ff324"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "block-modes"
 version = "0.8.1"
@@ -342,7 +351,7 @@ dependencies = [
  "base64 0.13.0",
  "chrono",
  "clap",
- "digest",
+ "digest 0.10.3",
  "hex",
  "openpgp-card",
  "openpgp-card-pcsc",
@@ -356,7 +365,7 @@ dependencies = [
  "serde",
  "serde_json",
  "sha1",
- "sha2",
+ "sha2 0.10.2",
  "simpledateformat",
  "u2f",
  "x509",
@@ -506,6 +515,16 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "crypto-common"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57952ca27b5e3606ff4dd79b0020231aaf9d6aa76dc05fd30137538c50bd3ce8"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "crypto-mac"
 version = "0.11.1"
@@ -628,6 +647,16 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "digest"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2fb860ca6fafa5552fb6d0e816a69c8e49f0908bf524e30a90d97c85892d506"
+dependencies = [
+ "block-buffer 0.10.2",
+ "crypto-common",
+]
+
 [[package]]
 name = "dirs"
 version = "2.0.2"
@@ -988,7 +1017,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a2a2320eb7ec0ebe8da8f744d7812d9fc4cb4d09344ac01898dbcb6a20ae69b"
 dependencies = [
  "crypto-mac",
- "digest",
+ "digest 0.9.0",
 ]
 
 [[package]]
@@ -1563,7 +1592,7 @@ checksum = "d053368e1bae4c8a672953397bd1bd7183dde1c72b0b7612a15719173148d186"
 dependencies = [
  "ecdsa",
  "elliptic-curve",
- "sha2",
+ "sha2 0.9.9",
 ]
 
 [[package]]
@@ -1921,7 +1950,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e05c2603e2823634ab331437001b411b9ed11660fbc4066f3908c84a9439260d"
 dependencies = [
  "byteorder",
- "digest",
+ "digest 0.9.0",
  "lazy_static",
  "num-bigint-dig",
  "num-integer",
@@ -2115,10 +2144,10 @@ version = "0.9.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "99cd6713db3cf16b6c84e06321e049a9b9f699826e16096d23bbcc44d15d51a6"
 dependencies = [
- "block-buffer",
+ "block-buffer 0.9.0",
  "cfg-if 1.0.0",
  "cpufeatures",
- "digest",
+ "digest 0.9.0",
  "opaque-debug",
 ]
 
@@ -2143,7 +2172,7 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f31bf4e9fe5cd8cea8e0887e2e4eb1b4d736ff11b776c8537bf0912a4b381285"
 dependencies = [
- "digest",
+ "digest 0.9.0",
  "generic-array",
 ]
 
@@ -2153,13 +2182,24 @@ version = "0.9.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4d58a1e1bf39749807d89cf2d98ac2dfa0ff1cb3faa38fbb64dd88ac8013d800"
 dependencies = [
- "block-buffer",
+ "block-buffer 0.9.0",
  "cfg-if 1.0.0",
  "cpufeatures",
- "digest",
+ "digest 0.9.0",
  "opaque-debug",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55deaec60f81eefe3cce0dc50bda92d6d8e88f2a27df7c5033b42afeb1ed2676"
+dependencies = [
+ "cfg-if 1.0.0",
+ "cpufeatures",
+ "digest 0.10.3",
+]
+
 [[package]]
 name = "shlex"
 version = "0.1.1"
@@ -2181,7 +2221,7 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2807892cfa58e081aa1f1111391c7a0649d4fa127a4ffbe34bcbfb35a1171a4"
 dependencies = [
- "digest",
+ "digest 0.9.0",
  "rand_core 0.6.3",
 ]
 
@@ -2836,7 +2876,7 @@ dependencies = [
  "rsa",
  "secrecy",
  "sha-1",
- "sha2",
+ "sha2 0.9.9",
  "subtle",
  "subtle-encoding",
  "uuid",
diff --git a/Cargo.toml b/Cargo.toml
index 00b1dff..2a9b214 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,8 +8,9 @@ edition = "2018"
 authenticator = "0.3"
 clap = "2.33"
 rust_util = { version = "0.6", features = ["use_clap"] }
-sha1 = "0.6.0"
-sha2 = "0.9"
+digest = "0.10"
+sha1 = "0.6"
+sha2 = "0.10"
 rand = "0.8"
 base64 = "0.13"
 serde = { version = "1.0", features = ["derive"] }
@@ -25,7 +26,6 @@ simpledateformat = "0.1.2"
 ring = "0.16.20"
 openssl = "0.10.35"
 pem = "0.8.3"
-digest = "0.9.0"
 yubikey = "0.5"
 yubico_manager = "0.9"
 x509 = "0.2"
diff --git a/src/cmd_piv.rs b/src/cmd_piv.rs
index e1e0507..2b9be36 100644
--- a/src/cmd_piv.rs
+++ b/src/cmd_piv.rs
@@ -77,7 +77,7 @@ fn print_cert_info(yubikey: &mut YubiKey, slot: SlotId, detail_output: bool) ->
 
     if !buf.is_empty() {
         information!("{}", "-".repeat(88));
-        let fingerprint_sha256 = Sha256::digest(&buf);
+        let fingerprint_sha256 = Sha256::digest(&*buf);
 
         let slot_id: u8 = slot.into();
         success!("Slot: {:?}, id: {:x}",  slot, slot_id);