diff --git a/Cargo.lock b/Cargo.lock
index 3286311..daefb43 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -799,6 +799,14 @@ dependencies = [
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "toml"
+version = "0.4.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde 1.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "treeline"
 version = "0.1.0"
@@ -826,6 +834,7 @@ dependencies = [
  "serde 1.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "structopt 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-segmentation 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1028,6 +1037,7 @@ dependencies = [
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
 "checksum textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
 "checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
+"checksum toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "758664fc71a3a69038656bee8b6be6477d2a6c315a6b81f7081f591bffa4111f"
 "checksum treeline 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a7f741b240f1a48843f9b8e0444fb55fb2a4ff67293b50a9179dfd5ea67f8d41"
 "checksum ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "535c204ee4d8434478593480b8f86ab45ec9aae0e83c568ca81abf0fd0e88f86"
 "checksum unicase 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7f4765f83163b74f957c797ad9253caf97f103fb064d3999aea9568d09fc8a33"
diff --git a/Cargo.toml b/Cargo.toml
index bc9cb67..4bb7a8a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,6 +30,7 @@ regex = "1.0"
 lazy_static = "1.2.0"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
+toml = "0.4"
 itertools = "0.8"
 unicase = "1.1"
 bstr = "0.2"
diff --git a/src/main.rs b/src/main.rs
index e15ff70..48b7d87 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,6 +2,7 @@
 #[macro_use]
 extern crate clap;
 
+use std::io::Read;
 use std::io::Write;
 
 use structopt::StructOpt;
@@ -42,6 +43,10 @@ struct Options {
     /// Paths to check
     path: Vec<std::path::PathBuf>,
 
+    #[structopt(short = "c", long = "config")]
+    /// Custom config file
+    custom_config: Option<String>,
+
     #[structopt(long, raw(overrides_with = r#""check-filenames""#))]
     /// Skip verifying spelling in file names.
     no_check_filenames: bool,
@@ -252,6 +257,13 @@ fn run() -> Result<i32, failure::Error> {
     let options = Options::from_args().infer();
 
     let mut config = config::Config::default();
+    if let Some(path) = options.custom_config.as_ref() {
+        let mut file = std::fs::File::open(path)?;
+        let mut s = String::new();
+        file.read_to_string(&mut s)?;
+        let custom: config::Config = toml::from_str(&s)?;
+        config.update(&custom);
+    }
     config.update(&options);
 
     let mut builder = get_logging(options.verbose.log_level());