diff --git a/src/cli/update.rs b/src/cli/update.rs
index cbbf182..0c3a00d 100644
--- a/src/cli/update.rs
+++ b/src/cli/update.rs
@@ -1,6 +1,6 @@
 //! The update subcommand used to get the latest allowed signers and write them to the output file.
-use crate::{AllowedSignersEntry, Config, Source, SshPublicKey};
-use std::collections::{HashMap, HashSet};
+use crate::{AllowedSignersEntry, Config, SourceMap, SshPublicKey};
+use std::collections::HashSet;
 
 pub(super) fn update(config: Config) {
     let sources = config.get_sources();
@@ -16,6 +16,6 @@ pub(super) fn update(config: Config) {
     }
 }
 
-fn get_public_keys(user: (), sources: &HashMap<String, Box<dyn Source>>) -> Vec<SshPublicKey> {
+fn get_public_keys(user: (), sources: &SourceMap) -> Vec<SshPublicKey> {
     todo!("Retrieve public keys for a user from all sources.");
 }
diff --git a/src/config.rs b/src/config.rs
index 6f71ab2..4b3c1eb 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,4 +1,4 @@
-use crate::Source;
+use crate::{Github, Gitlab, Source, SourceMap};
 use figment::{
     providers::{Format, Serialized, Toml},
     Figment,
@@ -46,8 +46,18 @@ impl Default for Config {
 impl Config {
     /// Get the configured sources.
     #[must_use]
-    pub fn get_sources(&self) -> HashMap<String, Box<dyn Source>> {
-        todo!()
+    pub fn get_sources(&self) -> SourceMap {
+        self.sources
+            .iter()
+            .map(|source_config| {
+                let name = source_config.name.clone();
+                let source: Box<dyn Source> = match source_config.provider {
+                    SourceType::Github => Box::new(Github::new(source_config.url.parse().unwrap())),
+                    SourceType::Gitlab => Box::new(Gitlab::new(source_config.url.parse().unwrap())),
+                };
+                (name, source)
+            })
+            .collect()
     }
 
     /// Load the configuration from a TOML file, using defaults for values that were not provided.
diff --git a/src/lib.rs b/src/lib.rs
index e84a0da..3d5cd0c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,7 +5,7 @@
 pub use config::Config;
 pub use core::*;
 pub use signer::{AllowedSignersEntry, AllowedSignersFile};
-pub use source::Source;
+pub use source::{Github, Gitlab, Source, SourceMap};
 
 pub mod cli;
 mod config;
diff --git a/src/source/main.rs b/src/source/main.rs
index 22190bf..e23cf33 100644
--- a/src/source/main.rs
+++ b/src/source/main.rs
@@ -1,5 +1,6 @@
 use crate::SshPublicKey;
 use async_trait::async_trait;
+use std::collections::HashMap;
 
 /// A source implements a way to get public keys from a Git provider.
 #[async_trait]
@@ -11,3 +12,6 @@ pub trait Source {
         client: &reqwest::Client,
     ) -> Result<Vec<SshPublicKey>, reqwest::Error>;
 }
+
+/// A `HashMap` containing named sources.
+pub type SourceMap = HashMap<String, Box<dyn Source>>;
diff --git a/src/source/mod.rs b/src/source/mod.rs
index 4008ec9..f5580df 100644
--- a/src/source/mod.rs
+++ b/src/source/mod.rs
@@ -1,4 +1,6 @@
-pub use main::Source;
+pub use github::Github;
+pub use gitlab::Gitlab;
+pub use main::{Source, SourceMap};
 
 mod github;
 mod gitlab;