diff --git a/Cargo.lock b/Cargo.lock
index 0529afa..6adf95e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1643,16 +1643,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "structopt"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt-derive 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt-derive 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "structopt-derive"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2141,7 +2141,7 @@ dependencies = [
  "pretty_env_logger 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-codec 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2403,8 +2403,8 @@ dependencies = [
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 "checksum string 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d0bbfb8937e38e34c3444ff00afb28b0811d9554f15c5ad64d12b0308d1d1995"
 "checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
-"checksum structopt 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6d4f66a4c0ddf7aee4677995697366de0749b0139057342eccbb609b12d0affc"
-"checksum structopt-derive 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8fe0c13e476b4e21ff7f5c4ace3818b6d7bdc16897c31c73862471bc1663acae"
+"checksum structopt 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "c167b61c7d4c126927f5346a4327ce20abf8a186b8041bbeb1ce49e5db49587b"
+"checksum structopt-derive 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "519621841414165d2ad0d4c92be8f41844203f2b67e245f9345a5a12d40c69d7"
 "checksum syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)" = "a1393e4a97a19c01e900df2aec855a29f71cf02c402e2f443b8d2747c25c5dbe"
 "checksum syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "66850e97125af79138385e9b88339cbcd037e3f28ceab8c5ad98e64f0f1f80bf"
 "checksum synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)" = "02353edf96d6e4dc81aea2d8490a7e9db177bf8acb0e951c24940bf866cb313f"
diff --git a/Cargo.toml b/Cargo.toml
index 32e09dc..a824893 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,7 +29,7 @@ log = "0.4.8"
 pretty_env_logger = "0.3.1"
 serde = "1.0.102"
 serde_json = "1.0.41"
-structopt = "0.3.3"
+structopt = "0.3.4"
 tokio = "0.1.22"
 tokio-codec= "0.1.1"
 tokio-io= "0.1.12"