diff --git a/.vscode/settings.json b/.vscode/settings.json
index 4d55b26..f7b8426 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -18,5 +18,8 @@
         "telegram",
         "discord",
         "matrix",
+    ],
+    "rust-analyzer.linkedProjects": [
+        "./Cargo.toml"
     ]
 }
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index 9187d5f..fa7eb81 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -990,6 +990,12 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "micronfig"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09d5fa5735feed9ff4d6fc550793ef80d18b90f33f3f89af6176318f295383cd"
+
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -1157,6 +1163,7 @@ dependencies = [
  "lazy_static",
  "log",
  "md5",
+ "micronfig",
  "pretty_env_logger",
  "rand",
  "regex",
diff --git a/Cargo.toml b/Cargo.toml
index 4668dd1..ab3733f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,6 +33,7 @@ hmac = { version = "0.12.1", optional = true }
 sha2 = { version = "0.10.6", optional = true }
 # exec
 pretty_env_logger = { version = "0.4.0", optional = true }
+micronfig = { version = "0.1.2", optional = true }
 # data
 serde = { version = "1.0.140", features = ["derive"] }
 serde_json = { version = "1.0.82" }
@@ -56,7 +57,7 @@ tokio = { version =  "1.20.3", features = ["rt-multi-thread", "macros"] }
 [features]
 jpg = ["hmac", "sha2", "base64", "hex"]
 test = ["tokio"]
-exec = ["pretty_env_logger"]
+exec = ["pretty_env_logger", "micronfig"]
 search = ["tantivy"]
 telegram = ["exec", "search", "jpg", "teloxide", "tokio", "md5", "rand"]
 discord = ["exec", "search", "serenity", "tokio", "anyhow"]
diff --git a/src/config/mod.rs b/src/config/mod.rs
new file mode 100644
index 0000000..fe3f86a
--- /dev/null
+++ b/src/config/mod.rs
@@ -0,0 +1,65 @@
+//! Module defining configurable values that can be used by the binaries.
+#![allow(missing_docs)]
+
+
+/// Configuration required by the `exec` feature.
+#[cfg(feature = "exec")]
+pub mod exec {
+	lazy_static::lazy_static! {
+		/// The locale that card data should be downloaded in.
+		/// 
+		/// # Examples
+		/// 
+		/// - `en_US`
+		/// - `it_IT`
+		/// 
+		pub static ref DATA_DRAGON_LOCALE: String = 
+			micronfig::required("DATA_DRAGON_LOCALE");
+
+		/// The set codes for which card data should be downloaded, separated by commas.
+		/// 
+		/// # Examples
+		/// 
+		/// - `set1,set2,set3`
+		/// - `set1`
+		/// - `set1,set2,set3,set4,set5,set6,set6cde,set7`
+		/// 
+		pub static ref DATA_DRAGON_SET_CODES: Vec<String> = 
+			micronfig::required::<String>("DATA_DRAGON_SET_CODES")
+				.split(",").map(|s: &str| s.to_string()).collect();
+	}
+}
+
+/// Configuration required by the `jpg` feature.
+#[cfg(feature = "jpg")]
+pub mod jpg {
+	lazy_static::lazy_static! {
+		/// Secret key configured in imgproxy.
+		pub static ref POROXY_KEY: Vec<u8> = micronfig::required("POROXY_KEY");
+
+		/// Salt configured in imgproxy.
+		pub static ref POROXY_SALT: String = micronfig::required("POROXY_SALT");
+
+		/// URL where imgproxy can be reached at.
+		pub static ref POROXY_HOST: String = micronfig::required("POROXY_HOST");
+	}
+}
+
+/// Configuration required by the `discord` feature.
+#[cfg(feature = "discord")]
+pub mod discord {
+	lazy_static::lazy_static! {
+		/// ID of the guild where commands should be registered in.
+		/// 
+		/// If not defined, commands are registered globally, and then cached.
+		/// 
+		/// Useful for development, since guild commands are not cached.
+		pub static ref SERENITY_DEV_GUILD_ID: Option<serenity::model::id::GuildId> = micronfig::optional("SERENITY_DEV_GUILD_ID").map(|s: u64| s.into());
+
+		/// The Discord bot token.
+		pub static ref SERENITY_TOKEN: String = micronfig::required("SERENITY_TOKEN");
+		
+		/// The Discord bot app ID.
+		pub static ref SERENITY_APPID: u64 = micronfig::required("SERENITY_APPID");
+	}
+}
\ No newline at end of file
diff --git a/src/data/setbundle/art.rs b/src/data/setbundle/art.rs
index a991916..b1d4292 100644
--- a/src/data/setbundle/art.rs
+++ b/src/data/setbundle/art.rs
@@ -53,8 +53,7 @@ impl CardArt {
         use hmac::Mac;
         use std::env;
 
-        let key = env::var("POROXY_KEY")
-            .expect("POROXY_KEY to be set");
+        let key = crate::config::jpg::POROXY_KEY;
         let key = hex::decode(key)
             .expect("POROXY_KEY to be a valid hex code");
 
diff --git a/src/lib.rs b/src/lib.rs
index 3b1076a..2a86f67 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -33,6 +33,9 @@
 
 pub mod data;
 
+#[cfg(feature = "exec")]
+pub mod config;
+
 #[cfg(feature = "search")]
 pub mod search;