diff --git a/.cargo/config.toml b/.cargo/config.toml
index 20f3d57..38583f5 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,7 +1,9 @@
 [alias]
-# Build the daemon with "firmware" profile and "ring" TLS backend.
-# Requires a cross-compiler (see github actions workflows) and is very slow to build.
-build-daemon-firmware = "build -p rayhunter-daemon --bin rayhunter-daemon --target armv7-unknown-linux-musleabihf --profile firmware --no-default-features --features ring-tls"
+# Build the daemon with "firmware" profile and post-quantum TLS backend.
+# Needs an arm-linux-musleabihf cross-compiler in PATH, e.g. a toolchain
+# from https://musl.cc, or run inside messense/rust-musl-cross:armv7-musleabihf
+# (which is what CI does, see .github/workflows/main.yml).
+build-daemon-firmware = "build -p rayhunter-daemon --bin rayhunter-daemon --target armv7-unknown-linux-musleabihf --profile firmware --no-default-features --features pq-tls"
 # Build the daemon with "firmware-devel" profile and "rustcrypto" backend.
 # Works with just the Rust toolchain, and is medium-slow to build. Binaries are slightly larger.
 build-daemon-firmware-devel = "build -p rayhunter-daemon --bin rayhunter-daemon --target armv7-unknown-linux-musleabihf --profile firmware-devel"
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b3c7b00..495bbff 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -314,27 +314,25 @@ jobs:
       - uses: actions/checkout@v4
         with:
           persist-credentials: false
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: armv7-unknown-linux-musleabihf
-      - uses: Swatinem/rust-cache@v2
-      - name: Install ARM cross-compilation toolchain
-        run: sudo apt-get update && sudo apt-get install -y gcc-arm-linux-gnueabihf
-      - name: Build rayhunter-daemon (armv7)
+      - name: Build frontend
         run: |
           pushd daemon/web
           npm install
           npm run build
           popd
-          # Run with -p so that cargo will select the minimum feature set for this package.
-          #
-          # Otherwise, it will consider the union of all requested features
-          # from all packages in the workspace. For example, if installer
-          # requires tokio with "full" feature, it will be included no matter
-          # what the feature selection in rayhunter-daemon is.
-          #
-          # https://github.com/rust-lang/cargo/issues/4463
-          CC_armv7_unknown_linux_musleabihf=arm-linux-gnueabihf-gcc cargo build-daemon-firmware
+      - name: Build rayhunter-daemon (armv7)
+        # Cross-compile inside messense/rust-musl-cross, which bundles an
+        # arm-linux-musleabihf cross gcc that aws-lc-sys needs.
+        run: |
+          mkdir -p "$HOME/.cargo-musl-cross"
+          docker run --rm \
+            --user "$(id -u):$(id -g)" \
+            -v "$PWD":/work \
+            -v "$HOME/.cargo-musl-cross":/cargo-home \
+            -e CARGO_HOME=/cargo-home \
+            -w /work \
+            messense/rust-musl-cross:armv7-musleabihf \
+            cargo build-daemon-firmware
       - uses: actions/upload-artifact@v4
         with:
           name: rayhunter-daemon
diff --git a/Cargo.lock b/Cargo.lock
index 3054b0c..7d3336c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -454,6 +454,28 @@ dependencies = [
  "arrayvec",
 ]
 
+[[package]]
+name = "aws-lc-rs"
+version = "1.16.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a054912289d18629dc78375ba2c3726a3afe3ff71b4edba9dedfca0e3446d1fc"
+dependencies = [
+ "aws-lc-sys",
+ "zeroize",
+]
+
+[[package]]
+name = "aws-lc-sys"
+version = "0.39.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83a25cf98105baa966497416dbd42565ce3a8cf8dbfd59803ec9ad46f3126399"
+dependencies = [
+ "cc",
+ "cmake",
+ "dunce",
+ "fs_extra",
+]
+
 [[package]]
 name = "axum"
 version = "0.8.4"
@@ -785,10 +807,11 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.2.23"
+version = "1.2.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f4ac86a9e5bc1e2b3449ab9d7d3a6a405e3d1bb28d7b9be8614f55846ae3766"
+checksum = "b7a4d3ec6524d28a329fc53654bbadc9bdd7b0431f5d65f1a56ffb28a1ee5283"
 dependencies = [
+ "find-msvc-tools",
  "jobserver",
  "libc",
  "shlex",
@@ -923,6 +946,15 @@ version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f46ad14479a25103f283c0f10005961cf086d8dc42205bb44c46ac563475dca6"
 
+[[package]]
+name = "cmake"
+version = "0.1.54"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7caa3f9de89ddbe2c607f4101924c5abec803763ae9534e4f4d7d8f84aa81f0"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "color_quant"
 version = "1.1.0"
@@ -1731,6 +1763,12 @@ dependencies = [
  "rustc_version",
 ]
 
+[[package]]
+name = "find-msvc-tools"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
+
 [[package]]
 name = "flate2"
 version = "1.1.1"
@@ -1794,6 +1832,12 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fs_extra"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c"
+
 [[package]]
 name = "funty"
 version = "2.0.0"
@@ -2049,10 +2093,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
 dependencies = [
  "cfg-if",
- "js-sys",
  "libc",
  "wasi 0.11.0+wasi-snapshot-preview1",
- "wasm-bindgen",
 ]
 
 [[package]]
@@ -2062,11 +2104,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
 dependencies = [
  "cfg-if",
- "js-sys",
  "libc",
  "r-efi",
  "wasi 0.14.2+wasi-0.2.4",
- "wasm-bindgen",
 ]
 
 [[package]]
@@ -3128,12 +3168,6 @@ dependencies = [
  "imgref",
 ]
 
-[[package]]
-name = "lru-slab"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "112b39cec0b298b6c1999fee3e31427f74f676e4cb9879ed1a121b43661a4154"
-
 [[package]]
 name = "mac"
 version = "0.1.1"
@@ -4428,61 +4462,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "quinn"
-version = "0.11.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "626214629cda6781b6dc1d316ba307189c85ba657213ce642d9c77670f8202c8"
-dependencies = [
- "bytes",
- "cfg_aliases",
- "pin-project-lite",
- "quinn-proto",
- "quinn-udp",
- "rustc-hash",
- "rustls",
- "socket2",
- "thiserror 2.0.12",
- "tokio",
- "tracing",
- "web-time",
-]
-
-[[package]]
-name = "quinn-proto"
-version = "0.11.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "434b42fec591c96ef50e21e886936e66d3cc3f737104fdb9b737c40ffb94c098"
-dependencies = [
- "bytes",
- "getrandom 0.3.3",
- "lru-slab",
- "rand 0.9.1",
- "ring",
- "rustc-hash",
- "rustls",
- "rustls-pki-types",
- "slab",
- "thiserror 2.0.12",
- "tinyvec",
- "tracing",
- "web-time",
-]
-
-[[package]]
-name = "quinn-udp"
-version = "0.5.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcebb1209ee276352ef14ff8732e24cc2b02bbac986cd74a4c81bcb2f9881970"
-dependencies = [
- "cfg_aliases",
- "libc",
- "once_cell",
- "socket2",
- "tracing",
- "windows-sys 0.59.0",
-]
-
 [[package]]
 name = "quote"
 version = "1.0.40"
@@ -4724,6 +4703,7 @@ dependencies = [
  "log",
  "rayhunter",
  "reqwest",
+ "rustls-post-quantum",
  "rustls-rustcrypto",
  "serde",
  "serde_json",
@@ -4845,7 +4825,6 @@ dependencies = [
  "log",
  "percent-encoding",
  "pin-project-lite",
- "quinn",
  "rustls",
  "rustls-pki-types",
  "serde",
@@ -4940,12 +4919,6 @@ version = "0.1.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f"
 
-[[package]]
-name = "rustc-hash"
-version = "2.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
-
 [[package]]
 name = "rustc_version"
 version = "0.4.1"
@@ -4983,14 +4956,15 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.23.28"
+version = "0.23.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7160e3e10bf4535308537f3c4e1641468cd0e485175d6163087c0393c7d46643"
+checksum = "758025cb5fccfd3bc2fd74708fd4682be41d99e5dff73c377c0646c6012c73a4"
 dependencies = [
+ "aws-lc-rs",
+ "log",
  "once_cell",
- "ring",
  "rustls-pki-types",
- "rustls-webpki 0.103.3",
+ "rustls-webpki 0.103.10",
  "subtle",
  "zeroize",
 ]
@@ -5001,10 +4975,20 @@ version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "229a4a4c221013e7e1f1a043678c5cc39fe5171437c88fb47151a21e6f5b5c79"
 dependencies = [
- "web-time",
  "zeroize",
 ]
 
+[[package]]
+name = "rustls-post-quantum"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0da3cd9229bac4fae1f589c8f875b3c891a058ddaa26eb3bde16b5e43dc174ce"
+dependencies = [
+ "aws-lc-rs",
+ "rustls",
+ "rustls-webpki 0.103.10",
+]
+
 [[package]]
 name = "rustls-rustcrypto"
 version = "0.0.2-alpha"
@@ -5048,10 +5032,11 @@ dependencies = [
 
 [[package]]
 name = "rustls-webpki"
-version = "0.103.3"
+version = "0.103.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4a72fe2bcf7a6ac6fd7d0b9e5cb68aeb7d4c0a0271730218b3e92d43b4eb435"
+checksum = "df33b2b81ac578cabaf06b89b0631153a3f416b0a886e8a7a1707fb51abbd1ef"
 dependencies = [
+ "aws-lc-rs",
  "ring",
  "rustls-pki-types",
  "untrusted",
@@ -6099,21 +6084,6 @@ dependencies = [
  "zerovec",
 ]
 
-[[package]]
-name = "tinyvec"
-version = "1.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfa5fdc3bce6191a1dbc8c02d5c8bffcf557bafa17c124c5264a458f1b0613fa"
-dependencies = [
- "tinyvec_macros",
-]
-
-[[package]]
-name = "tinyvec_macros"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
-
 [[package]]
 name = "tokio"
 version = "1.45.0"
@@ -6775,16 +6745,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "web-time"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
-dependencies = [
- "js-sys",
- "wasm-bindgen",
-]
-
 [[package]]
 name = "webkit2gtk"
 version = "2.0.1"
diff --git a/daemon/Cargo.toml b/daemon/Cargo.toml
index dd48754..f03674a 100644
--- a/daemon/Cargo.toml
+++ b/daemon/Cargo.toml
@@ -16,7 +16,7 @@ required-features = ["apidocs"]
 [features]
 default = ["rustcrypto-tls"]
 rustcrypto-tls = ["reqwest/rustls-tls-webpki-roots-no-provider", "dep:rustls-rustcrypto"]
-ring-tls = ["reqwest/rustls-tls-webpki-roots"]
+pq-tls = ["reqwest/rustls-tls-webpki-roots-no-provider", "dep:rustls-post-quantum"]
 apidocs = ["dep:utoipa"]
 
 [dependencies]
@@ -41,5 +41,6 @@ async_zip = { version = "0.0.17", features = ["tokio"] }
 anyhow = "1.0.98"
 reqwest = { version = "0.12.20", default-features = false }
 rustls-rustcrypto = { version = "0.0.2-alpha", optional = true }
+rustls-post-quantum = { version = "0.2.4", optional = true }
 async-trait = "0.1.88"
 utoipa = { version = "5.4.0", optional = true }
diff --git a/daemon/src/crypto_provider.rs b/daemon/src/crypto_provider.rs
new file mode 100644
index 0000000..2469e1a
--- /dev/null
+++ b/daemon/src/crypto_provider.rs
@@ -0,0 +1,23 @@
+use std::sync::Once;
+
+static INSTALL: Once = Once::new();
+
+/// Install the default rustls `CryptoProvider` for the current process.
+///
+/// This is idempotent so that it's easier to use in tests, but also panics loudly if the
+/// initialization fails.
+pub fn install_default() {
+    // Crypto providers fail if they get initialized multiple times, but we don't want to just
+    // ignore all errors, hence the use of once.
+    INSTALL.call_once(|| {
+        #[cfg(feature = "rustcrypto-tls")]
+        rustls_rustcrypto::provider()
+            .install_default()
+            .expect("failed to install rustcrypto crypto provider");
+
+        #[cfg(feature = "pq-tls")]
+        rustls_post_quantum::provider()
+            .install_default()
+            .expect("failed to install aws-lc-rs post-quantum crypto provider");
+    });
+}
diff --git a/daemon/src/lib.rs b/daemon/src/lib.rs
index f3d4c77..efc2f60 100644
--- a/daemon/src/lib.rs
+++ b/daemon/src/lib.rs
@@ -1,6 +1,7 @@
 pub mod analysis;
 pub mod battery;
 pub mod config;
+pub mod crypto_provider;
 pub mod diag;
 pub mod display;
 pub mod error;
diff --git a/daemon/src/main.rs b/daemon/src/main.rs
index 9fb661d..11a7903 100644
--- a/daemon/src/main.rs
+++ b/daemon/src/main.rs
@@ -1,6 +1,7 @@
 mod analysis;
 mod battery;
 mod config;
+mod crypto_provider;
 mod diag;
 mod display;
 mod error;
@@ -173,12 +174,7 @@ fn run_shutdown_thread(
 async fn main() -> Result<(), RayhunterError> {
     rayhunter::init_logging(log::LevelFilter::Info);
 
-    #[cfg(feature = "rustcrypto-tls")]
-    {
-        rustls_rustcrypto::provider()
-            .install_default()
-            .expect("Couldn't install rustcrypto provider");
-    }
+    crate::crypto_provider::install_default();
 
     let args = parse_args();
 
diff --git a/daemon/src/notifications.rs b/daemon/src/notifications.rs
index e96f632..7432a6d 100644
--- a/daemon/src/notifications.rs
+++ b/daemon/src/notifications.rs
@@ -223,10 +223,7 @@ mod tests {
     }
 
     async fn setup_test_server() -> (Arc<Mutex<Vec<String>>>, String) {
-        #[cfg(feature = "rustcrypto-tls")]
-        {
-            let _ = rustls_rustcrypto::provider().install_default();
-        }
+        crate::crypto_provider::install_default();
 
         let received_messages = Arc::new(Mutex::new(Vec::new()));
         let test_state = TestServerState {