diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index db0e0ef..246d372 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -1410,16 +1410,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "structopt"
-version = "0.3.1"
+version = "0.3.3"
 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 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt-derive 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "structopt-derive"
-version = "0.3.1"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1907,7 +1907,7 @@ dependencies = [
  "serde 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "time-cache 0.1.0",
 ]
 
@@ -2064,8 +2064,8 @@ dependencies = [
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 "checksum string 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d24114bfcceb867ca7f71a0d3fe45d45619ec47a6fbfa98cb14e14250bfa5d6d"
 "checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
-"checksum structopt 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2ac9d6e93dd792b217bf89cda5c14566e3043960c6f9da890c2ba5d09d07804c"
-"checksum structopt-derive 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2ae9e5165d463a0dea76967d021f8d0f9316057bf5163aa2a4843790e842ff37"
+"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 syn 0.15.41 (registry+https://github.com/rust-lang/crates.io-index)" = "5f48d3b9d3d5ee64217007ead81e80d40674c80e930cf53ed089f0f809fae31e"
 "checksum syn 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "158521e6f544e7e3dcfc370ac180794aa38cb34a1b1e07609376d4adcf429b93"
 "checksum synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)" = "02353edf96d6e4dc81aea2d8490a7e9db177bf8acb0e951c24940bf866cb313f"
diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index 88dc470..dc8aaf9 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -19,5 +19,5 @@ pretty_env_logger = "0.3.1"
 serde = { version = "1.0.100", features = ["rc"] }
 serde_derive = "1.0.100"
 serde_json = "1.0.40"
-structopt = "0.3.1"
+structopt = "0.3.3"
 time-cache = { path = "../time-cache" }