diff --git a/Cargo.lock b/Cargo.lock
index 2201385..71cae62 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -293,18 +293,18 @@ dependencies = [
 
 [[package]]
 name = "gumdrop"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee50908bc1beeac1f2902e0b4e0cd0d844e716f5ebdc6f0cfc1163fe5e10bcde"
+checksum = "46571f5d540478cf70d2a42dd0d6d8e9f4b9cc7531544b93311e657b86568a0b"
 dependencies = [
  "gumdrop_derive",
 ]
 
 [[package]]
 name = "gumdrop_derive"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90454ce4de40b7ca6a8968b5ef367bdab48413962588d0d2b1638d60090c35d7"
+checksum = "915ef07c710d84733522461de2a734d4d62a3fd39a4d4f404c2f385ef8618d05"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 3be5a6e..e5dfbe0 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -13,7 +13,7 @@ categories = ["command-line-utilities", "cryptography", "hardware-support"]
 keywords   = ["ecdsa", "rsa", "piv", "pcsc", "yubikey"]
 
 [dependencies]
-gumdrop = "0.7"
+gumdrop = "0.8"
 env_logger = "0.7"
 lazy_static = "1"
 log = "0.4"