diff --git a/firmware/Cargo.lock b/firmware/Cargo.lock
index 22215f1..f0f9da1 100644
--- a/firmware/Cargo.lock
+++ b/firmware/Cargo.lock
@@ -1,11 +1,12 @@
 [root]
 name = "ionpak-firmware"
-version = "0.1.0"
+version = "1.0.0"
 dependencies = [
  "cortex-m 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "cortex-m-rt 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "smoltcp 0.4.0-pre (git+https://github.com/m-labs/smoltcp?rev=d03ea64)",
  "tm4c129x 0.5.0 (git+https://github.com/m-labs/dslite2svd?rev=d527f3f)",
+ "walkdir 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -42,6 +43,15 @@ dependencies = [
  "r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "kernel32-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "managed"
 version = "0.3.0"
@@ -52,6 +62,15 @@ name = "r0"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "same-file"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "smoltcp"
 version = "0.4.0-pre"
@@ -85,15 +104,40 @@ dependencies = [
  "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "walkdir"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "same-file 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [metadata]
 "checksum aligned 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d1a92995cea48691c7c93e12597cca4d692bb3130d0a291c7141b9793c7829e7"
 "checksum bare-metal 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "19de0ac42f6977d7428858b750131ea9c8166f4ccb7deeab38b6a8656c9798b0"
 "checksum byteorder 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff81738b726f5d099632ceaffe7fb65b90212e8dce59d518729e7e8634032d3d"
 "checksum cortex-m 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4d553ca1f23403c81e6d3d28a64ef6e8eadd7f395195aacda65cbc0dc987738e"
 "checksum cortex-m-rt 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "ec28308ef272803380c9c4e6708bf1d794ddcc8c9d511b9976b31ac3322452e5"
+"checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum managed 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "61eb783b4fa77e8fa4d27ec400f97ed9168546b8b30341a120b7ba9cc6571aaf"
 "checksum r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2a38df5b15c8d5c7e8654189744d8e396bddc18ad48041a500ce52d6948941f"
+"checksum same-file 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d931a44fdaa43b8637009e7632a02adc4f2b2e0733c08caa4cf00e8da4a117a7"
 "checksum smoltcp 0.4.0-pre (git+https://github.com/m-labs/smoltcp?rev=d03ea64)" = "<none>"
 "checksum tm4c129x 0.5.0 (git+https://github.com/m-labs/dslite2svd?rev=d527f3f)" = "<none>"
 "checksum vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "45c297f0afb6928cd08ab1ff9d95e99392595ea25ae1b5ecf822ff8764e57a0d"
 "checksum volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0d67cb4616d99b940db1d6bd28844ff97108b498a6ca850e5b6191a532063286"
+"checksum walkdir 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "bb08f9e670fab86099470b97cd2b252d6527f0b3cc1401acdb595ffc9dd288ff"
+"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
+"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
diff --git a/firmware/Cargo.toml b/firmware/Cargo.toml
index 2ef1c05..c741700 100644
--- a/firmware/Cargo.toml
+++ b/firmware/Cargo.toml
@@ -1,8 +1,11 @@
 [package]
 name = "ionpak-firmware"
-version = "0.1.0"
+version = "1.0.0"
 authors = ["whitequark <whitequark@whitequark.org>"]
 
+[build-dependencies]
+walkdir = "1.0"
+
 [dependencies]
 cortex-m = "0.3.1"
 cortex-m-rt = { version = "0.3.5" }
diff --git a/firmware/build.rs b/firmware/build.rs
index 88f7fef..7e55d6c 100644
--- a/firmware/build.rs
+++ b/firmware/build.rs
@@ -1,9 +1,53 @@
-use std::env;
-use std::fs::File;
-use std::io::Write;
-use std::path::PathBuf;
+extern crate walkdir;
 
-fn main() {
+use std::env;
+use std::io::Write;
+use std::fs::File;
+use std::path::{Path, PathBuf};
+use std::process::Command;
+
+use walkdir::WalkDir;
+
+fn git_describe() {
+    let git_dir = Path::new("../.git");
+
+    println!("cargo:rerun-if-changed={}", git_dir.join("HEAD").display());
+    for entry in WalkDir::new(git_dir.join("refs")) {
+        let entry = entry.unwrap();
+        println!("cargo:rerun-if-changed={}", entry.path().display());
+    }
+
+    let version;
+    if git_dir.exists() {
+        let git_describe =
+            Command::new("git")
+                    .arg("describe")
+                    .arg("--tags")
+                    .arg("--dirty")
+                    .arg("--always")
+                    .arg("--long")
+                    .arg("--abbrev=8")
+                    .output()
+                    .ok()
+                    .and_then(|o| String::from_utf8(o.stdout).ok())
+                    .map(|mut s| {
+                        let len = s.trim_right().len();
+                        s.truncate(len);
+                        s
+                    })
+                    .unwrap();
+        let parts = git_describe.split("-").collect::<Vec<_>>();
+        version = format!("{}+{}.{}", parts[0], parts[1], parts[2]);
+    } else {
+        version = "unknown".to_owned();
+    }
+
+    let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
+    let mut f = File::create(out_dir.join("git-describe")).unwrap();
+    write!(f, "{}", version).unwrap();
+}
+
+fn linker_script() {
     // Put the linker script somewhere the linker can find it
     let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
     File::create(out.join("memory.x"))
@@ -15,3 +59,8 @@ fn main() {
     println!("cargo:rerun-if-changed=build.rs");
     println!("cargo:rerun-if-changed=memory.x");
 }
+
+fn main() {
+    linker_script();
+    git_describe();
+}
diff --git a/firmware/src/pages.rs b/firmware/src/pages.rs
index 28ba298..5cd4ecf 100644
--- a/firmware/src/pages.rs
+++ b/firmware/src/pages.rs
@@ -61,6 +61,11 @@ pub fn serve(output: &mut TcpSocket, request: &http::Request,
                 cathode_fbv=OpnFmt(cathode.fbv),
                 ion_current=OpnFmt(electrometer.ic.and_then(|x| Some(x*1.0e9)))).unwrap();
         },
+        b"/firmware.html" => {
+            http::write_reply_header(output, 200, "text/html; charset=utf-8", false).unwrap();
+            write!(output, include_str!("firmware.html"),
+                   version=include_str!(concat!(env!("OUT_DIR"), "/git-describe"))).unwrap();
+        }
         b"/style.css" => {
             let data = include_bytes!("style.css.gz");
             http::write_reply_header(output, 200, "text/css", true).unwrap();