diff --git a/entities/src/state/mod.rs b/entities/src/state/mod.rs
index a887b53..7fe95d9 100644
--- a/entities/src/state/mod.rs
+++ b/entities/src/state/mod.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 //! Global state and structures.
 //! For build process decoupling
 
diff --git a/migration/src/main.rs b/migration/src/main.rs
index c6b6e48..dfc526a 100644
--- a/migration/src/main.rs
+++ b/migration/src/main.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 use sea_orm_migration::prelude::*;
 
 #[async_std::main]
diff --git a/scanner/src/about_parser.rs b/scanner/src/about_parser.rs
index db6ee9f..5134960 100644
--- a/scanner/src/about_parser.rs
+++ b/scanner/src/about_parser.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 use regex::{Regex, RegexBuilder};
 use scraper::{Html, Selector};
 use thiserror::Error;
diff --git a/scanner/src/cache_update.rs b/scanner/src/cache_update.rs
index 0ef1cf5..5edc59b 100644
--- a/scanner/src/cache_update.rs
+++ b/scanner/src/cache_update.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 use std::collections::HashMap;
 
 use chrono::{Days, Utc};
diff --git a/scanner/src/instance_check.rs b/scanner/src/instance_check.rs
index 68174a8..8944045 100644
--- a/scanner/src/instance_check.rs
+++ b/scanner/src/instance_check.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 //! Instance health/uptime checking code
 use std::time::Instant;
 
diff --git a/scanner/src/instance_parser.rs b/scanner/src/instance_parser.rs
index 16efbc1..95e4ab8 100644
--- a/scanner/src/instance_parser.rs
+++ b/scanner/src/instance_parser.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 use std::collections::HashMap;
 
 use reqwest::Url;
diff --git a/scanner/src/lib.rs b/scanner/src/lib.rs
index 8291dc6..24a4640 100644
--- a/scanner/src/lib.rs
+++ b/scanner/src/lib.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 use std::{
     sync::{Arc, Mutex},
     time::Instant,
diff --git a/server/src/api.rs b/server/src/api.rs
index cc32565..3739537 100644
--- a/server/src/api.rs
+++ b/server/src/api.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 use crate::{Result, ServerError};
 use axum::response::IntoResponse;
 use axum::{extract::State, Json};
diff --git a/server/src/lib.rs b/server/src/lib.rs
index 64834a6..db48b94 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 use std::{borrow::Cow, net::SocketAddr, sync::Arc};
 
 use axum::{extract::DefaultBodyLimit, http::HeaderValue, response::Html, routing::get, Router};
diff --git a/server/src/website.rs b/server/src/website.rs
index c08a0f8..f567e5a 100644
--- a/server/src/website.rs
+++ b/server/src/website.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 use std::sync::Arc;
 
 use crate::Result;
diff --git a/server/templates/about.html.j2 b/server/templates/about.html.j2
index e1c7cd5..cb8ea54 100644
--- a/server/templates/about.html.j2
+++ b/server/templates/about.html.j2
@@ -1,3 +1,4 @@
+{# SPDX-License-Identifier: AGPL-3.0-only #}
 <!DOCTYPE html>
 <html lang="en">
   <head>
diff --git a/server/templates/instances.html.j2 b/server/templates/instances.html.j2
index 1454c52..92db110 100644
--- a/server/templates/instances.html.j2
+++ b/server/templates/instances.html.j2
@@ -1,3 +1,4 @@
+{# SPDX-License-Identifier: AGPL-3.0-only #}
 <!DOCTYPE html>
 <html lang="en">
   <head>
diff --git a/src/main.rs b/src/main.rs
index 1e89eff..8496021 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: AGPL-3.0-only
 use std::{env::var, time::Duration};
 
 use entities::state::scanner::ScannerConfig;