diff --git a/src/args.rs b/src/args.rs
index 8a60156..54b37d0 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -37,7 +37,7 @@ pub fn get_matches_for(args: Vec<&str>) -> Result<ArgMatches<'static>> {
     return build().get_matches_from_safe(args);
 }
 
-pub fn get_verbose(m: &ArgMatches) -> u64 {
+pub fn get_verbose(m: ArgMatches) -> u64 {
     let sub = m.subcommand_matches(&m.subcommand_name().unwrap()).unwrap();
     m.occurrences_of("verbose") + sub.occurrences_of("verbose")
 }
diff --git a/src/build/mod.rs b/src/build/mod.rs
index a0629cd..f060e48 100644
--- a/src/build/mod.rs
+++ b/src/build/mod.rs
@@ -3,7 +3,7 @@ pub mod pandoc;
 use config::Config;
 
 
-pub fn build_input(config: &Config, input: String) -> Result<String, String> {
-    pandoc::render(&config, input);
+pub fn build_input(config: Config, input: String) -> Result<String, String> {
+    pandoc::render(config, input);
     return Ok("".into());
 }
diff --git a/src/build/pandoc.rs b/src/build/pandoc.rs
index 401201b..3801117 100644
--- a/src/build/pandoc.rs
+++ b/src/build/pandoc.rs
@@ -1,11 +1,11 @@
 use config::Config;
 use pandoc::Pandoc;
 
-fn build_pandoc(config: &Config) -> Pandoc {
+fn build_pandoc(config: Config) -> Pandoc {
     return Pandoc::new();
 }
 
 
-pub fn render(config: &Config, input: String) {
+pub fn render(config: Config, input: String) {
     let renderer = build_pandoc(config);
 }
diff --git a/src/config/mod.rs b/src/config/mod.rs
index 9be3d58..1ca2c5c 100644
--- a/src/config/mod.rs
+++ b/src/config/mod.rs
@@ -10,7 +10,7 @@ pub mod consts;
 pub mod validate_types;
 
 
-#[derive(Debug, Serialize, Deserialize, Default)]
+#[derive(Debug, Serialize, Deserialize, Default, Clone)]
 pub struct Config {
     pub input: Vec<PathBuf>,
     pub output: HashMap<String, PathBuf>,
@@ -21,8 +21,8 @@ pub struct Config {
 impl Config {
     fn new(raw: Value) -> Config {
         return Config {
-            input: read::get_input_files(&raw),
-            output: read::get_output_files(&raw),
+            input: read::get_input_files(raw.clone()),
+            output: read::get_output_files(raw.clone()),
             title: read::get_string(&raw, "title"),
             ..Default::default()
         };
@@ -32,8 +32,8 @@ impl Config {
 
 pub fn get_config() -> Result<Config, String> {
     let config_str = try!(read::read());
-    let config =
+    let config: Value =
         try!(result_prefix(serde_yaml::from_str(&config_str), "Config Parse Error".into()));
-    try!(result_prefix(validate::validate(&config), "Config Validation Error".into()));
+    try!(result_prefix(validate::validate(config.clone()), "Config Validation Error".into()));
     return Ok(Config::new(config));
 }
diff --git a/src/config/read.rs b/src/config/read.rs
index 559766f..1166742 100644
--- a/src/config/read.rs
+++ b/src/config/read.rs
@@ -39,14 +39,14 @@ pub fn get_string(conf: &Value, key: &str) -> String {
 }
 
 
-pub fn get_input_files(conf: &Value) -> Vec<PathBuf> {
+pub fn get_input_files(conf: Value) -> Vec<PathBuf> {
     let working_dir = current_dir().unwrap();
     let input_values = conf.get("input").unwrap().as_sequence().unwrap().to_vec();
     return input_values.into_iter().map(|x| working_dir.join(to_string(&x))).collect();
 }
 
 
-pub fn get_output_files(conf: &Value) -> HashMap<String, PathBuf> {
+pub fn get_output_files(conf: Value) -> HashMap<String, PathBuf> {
     let working_dir = current_dir().unwrap();
     let output_raw = conf.get("output").unwrap().as_mapping().unwrap();
     let mut output_map: HashMap<String, PathBuf> = HashMap::new();
diff --git a/src/config/validate.rs b/src/config/validate.rs
index 73cd467..19f1f90 100644
--- a/src/config/validate.rs
+++ b/src/config/validate.rs
@@ -7,7 +7,7 @@ use config::read;
 use config::validate_types::check_config_types;
 
 
-fn check_required_keys(config: &Value) -> ValidationResult {
+fn check_required_keys(config: Value) -> ValidationResult {
     for key in vec!["input", "output", "title"].iter() {
         if config.get(key).is_none() {
             return Err(format!("Missing required key {}.", key));
@@ -16,7 +16,7 @@ fn check_required_keys(config: &Value) -> ValidationResult {
     return Ok(());
 }
 
-fn check_input_files(config: &Value) -> ValidationResult {
+fn check_input_files(config: Value) -> ValidationResult {
     let files = read::get_input_files(config);
 
     for file in files.iter() {
@@ -27,7 +27,7 @@ fn check_input_files(config: &Value) -> ValidationResult {
     return Ok(());
 }
 
-fn check_output_files(config: &Value) -> ValidationResult {
+fn check_output_files(config: Value) -> ValidationResult {
     let files = read::get_output_files(config);
     let output_types = vec!["pdf".into()];
     for file_def in files.iter() {
@@ -42,18 +42,15 @@ fn check_output_files(config: &Value) -> ValidationResult {
     return Ok(());
 }
 
-pub fn unwrap_group(
-    config: &Value,
-    funcs: Vec<&Fn(&Value) -> ValidationResult>,
-) -> ValidationResult {
+pub fn unwrap_group(config: Value, funcs: Vec<&Fn(Value) -> ValidationResult>) -> ValidationResult {
     for func in funcs.iter() {
-        try!(func(config));
+        try!(func(config.clone()));
     }
     return Ok(());
 }
 
 
-pub fn validate(config: &Value) -> ValidationResult {
+pub fn validate(config: Value) -> ValidationResult {
     return unwrap_group(
         config,
         vec![&check_required_keys, &check_config_types, &check_input_files, &check_output_files]
diff --git a/src/config/validate_types.rs b/src/config/validate_types.rs
index 7f72324..26b1f0e 100644
--- a/src/config/validate_types.rs
+++ b/src/config/validate_types.rs
@@ -2,14 +2,14 @@ use config::validate::{unwrap_group, ValidationResult};
 use serde_yaml::Value;
 
 
-fn check_root(config: &Value) -> ValidationResult {
+fn check_root(config: Value) -> ValidationResult {
     if !config.is_mapping() {
         return Err("Config should be a mapping".into());
     }
     return Ok(());
 }
 
-fn check_input(config: &Value) -> ValidationResult {
+fn check_input(config: Value) -> ValidationResult {
     let input = config.get("input").unwrap();
     if !input.is_sequence() {
         return Err("Input must be sequence".into());
@@ -27,7 +27,7 @@ fn check_input(config: &Value) -> ValidationResult {
     return Ok(());
 }
 
-fn check_output(config: &Value) -> ValidationResult {
+fn check_output(config: Value) -> ValidationResult {
     let output = config.get("output").unwrap();
     if !output.is_mapping() {
         return Err("Output must be mapping".into());
@@ -48,7 +48,7 @@ fn check_output(config: &Value) -> ValidationResult {
     return Ok(());
 }
 
-fn check_title(config: &Value) -> ValidationResult {
+fn check_title(config: Value) -> ValidationResult {
     if !config.get("title").unwrap().is_string() {
         return Err("Title should be a string".into());
     }
@@ -56,6 +56,6 @@ fn check_title(config: &Value) -> ValidationResult {
 }
 
 
-pub fn check_config_types(config: &Value) -> ValidationResult {
+pub fn check_config_types(config: Value) -> ValidationResult {
     return unwrap_group(config, vec![&check_root, &check_input, &check_output, &check_title]);
 }
diff --git a/src/main.rs b/src/main.rs
index 6f2b588..aa28e86 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -32,7 +32,7 @@ fn ok_or_exit<T>(res: Result<T, String>) -> T {
     };
 }
 
-fn get_config(args: &ArgMatches) -> Config {
+fn get_config(args: ArgMatches) -> Config {
     let mut config = ok_or_exit(config::get_config());
     config.verbosity = args::get_verbose(args);
     return config;
@@ -45,7 +45,7 @@ fn main() {
 
     match subcommand {
         "build" => {
-            let config = get_config(&args);
+            let config = get_config(args.clone());
             ok_or_exit(process::build(config));
         }
         cmd => {
diff --git a/src/process.rs b/src/process.rs
index 1c84228..3714b15 100644
--- a/src/process.rs
+++ b/src/process.rs
@@ -6,6 +6,6 @@ use build::build_input;
 pub fn build(config: Config) -> Result<(), String> {
     let input = try!(read_input_files(config.input.clone()));
     println!("{}", input);
-    build_input(&config, input);
+    build_input(config.clone(), input);
     return Ok(());
 }
diff --git a/src/tests/args.rs b/src/tests/args.rs
index e3571e8..fdad971 100644
--- a/src/tests/args.rs
+++ b/src/tests/args.rs
@@ -16,7 +16,7 @@ fn incorrect_subcommand() {
 #[test]
 fn verbose_number() {
     fn get_verbose_level(arg_list: Vec<&str>) -> u64 {
-        return args::get_verbose(&args::get_matches_for(arg_list).unwrap());
+        return args::get_verbose(args::get_matches_for(arg_list).unwrap());
     }
 
     assert_eq!(get_verbose_level(vec!["mdp", "build", "-v"]), 1);