diff --git a/Cargo.lock b/Cargo.lock
index ec464f9..4686b48 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -111,6 +111,12 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
+[[package]]
+name = "expect-exit"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c51a35d7c9abd6c97c27ac44c4295fec4f51ffd2dcbf6fd45fc1cd39d11ad9df"
+
 [[package]]
 name = "hashbrown"
 version = "0.14.1"
@@ -141,9 +147,10 @@ checksum = "af150ab688ff2122fcef229be89cb50dd66af9e01a4ff320cc137eecc9bacc38"
 
 [[package]]
 name = "manplan"
-version = "0.1.3"
+version = "0.1.4"
 dependencies = [
  "clap",
+ "expect-exit",
  "maplit",
  "regex",
  "serde",
diff --git a/Cargo.toml b/Cargo.toml
index e350572..98c239d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "manplan"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["Gerard Krupa"]
 edition = "2021"
 description = "Tool for keeping sdkman candidates up-to-date"
@@ -17,6 +17,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_yaml = "0.9"
 maplit = "1.0.2"
 clap = { version = "4.4.6", features = ["derive"] }
+expect-exit = "0.5.2"
 
 [profile.release]
 lto = "fat"
diff --git a/src/main.rs b/src/main.rs
index 3bff5c0..aea8759 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,9 @@
 use std::collections::HashSet;
-use std::fs;
+use std::path::Path;
+use std::{env, fs};
 
 use clap::Parser;
+use expect_exit::Expected;
 
 use crate::rules::{parse_rules, VersionMatch};
 use crate::sdkman::{SdkMan, ToolManager};
@@ -14,7 +16,7 @@ pub mod sdkman;
 struct Args {
     /// Filename of the YAML config file
     #[arg(short, long)]
-    file: String,
+    file: Option<String>,
 
     /// Just print out the commands that would be executed
     #[arg(short, long, default_value_t = false)]
@@ -25,6 +27,19 @@ struct Args {
     no_uninstall: bool,
 }
 
+#[allow(clippy::needless_return)]
+fn get_rules_file(args: &Args) -> Option<String> {
+    if let Some(file) = args.file.as_ref() {
+        return Some(file.clone());
+    } else if let Ok(home) = env::var("HOME") {
+        let dotfile = Path::new(home.as_str()).join(".sdk-rules.yaml");
+        if dotfile.is_file() {
+            return Some(dotfile.to_str().unwrap().to_string());
+        }
+    }
+    return None;
+}
+
 fn main() {
     let args = Args::parse();
 
@@ -32,7 +47,11 @@ fn main() {
         dry_run: args.dry_run,
         no_uninstall: args.no_uninstall,
     };
-    let rules = parse_rules(fs::read_to_string(args.file).expect("Failed to read input file"));
+
+    let rules_file =
+        get_rules_file(&args).or_exit_("Must specify -f or have a ~/.sdk-rules.yaml file");
+    let rules = parse_rules(fs::read_to_string(rules_file).or_exit_("Failed to read rules file"));
+
     for (name, candidate) in rules.expect("Rules file could not be parsed").candidates {
         let installed: HashSet<_> = sdkman
             .installed_versions(name.clone())