diff --git a/src/cli_args/mod.rs b/src/cli_args/mod.rs
index 7b99b0d..bafd36a 100644
--- a/src/cli_args/mod.rs
+++ b/src/cli_args/mod.rs
@@ -2,7 +2,7 @@ use std::fmt::{Display, Error, Formatter};
 use std::hash::{Hash, Hasher};
 use std::path::PathBuf;
 use std::str::FromStr;
-use structopt::clap::AppSettings;
+use structopt::clap::{AppSettings, Shell};
 use structopt::StructOpt;
 
 mod config;
@@ -253,8 +253,8 @@ pub enum Command {
     /// Generate bash completion scripts
     #[structopt(name = "completions", setting = AppSettings::Hidden)]
     GenerateCompletions {
-        /// Shell to generate completions for: bash, fish
-        #[structopt(possible_values = &["bash", "fish"])]
+        /// Shell to generate completions for
+        #[structopt(possible_values = &Shell::variants()[..])]
         shell: String,
         out_dir: PathBuf,
     },