diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..7d02d8e
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,40 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - '[0-9]*'
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Setup Java
+        uses: actions/setup-java@v5
+        with:
+          java-version: '17'
+          distribution: 'corretto'
+
+      - name: Install clojure tools
+        uses: DeLaGuardo/setup-clojure@13.6.0
+        with:
+          cli: 1.12.5.1645
+
+      - name: Cache clojure dependencies
+        uses: actions/cache@v5
+        with:
+          path: |
+            ~/.m2/repository
+            ~/.gitlibs
+            ~/.deps.clj
+          key: cljdeps-${{ hashFiles('deps.edn') }}
+
+      - name: Deploy to Clojars
+        env:
+          CLOJARS_USERNAME: ${{ secrets.CLOJARS_USERNAME }}
+          CLOJARS_PASSWORD: ${{ secrets.CLOJARS_PASSWORD }}
+        run: clojure -T:build deploy :version '"${{ github.ref_name }}"'
diff --git a/build.clj b/build.clj
index 251a770..01a7733 100644
--- a/build.clj
+++ b/build.clj
@@ -2,38 +2,43 @@
 
 (ns build
   (:require [clojure.tools.build.api :as build]
-            [clojure.string :as string]
             [net.lewisship.build :as b]))
 
 (def lib 'io.github.hlship/cli-tools)
-(def version (-> "version.txt"
-                 slurp
-                 string/trim))
 
-(def jar-params {:project-name lib
-                 :version      version
-                 :aliases      [:pom]})
+(defn- resolve-version
+  "Version comes from :version, or the exact git tag on HEAD."
+  [{:keys [version]}]
+  (or version
+      (build/git-process {:git-args ["describe" "--tags" "--exact-match"]})
+      (throw (ex-info "No version: pass :version or check out a tagged commit" {}))))
+
+(defn- jar-params
+  [params]
+  {:project-name lib
+   :version      (resolve-version params)
+   :aliases      [:pom]})
 
 (defn clean
   [_params]
   (build/delete {:path "target"}))
 
 (defn jar
-  [_params]
-  (b/create-jar jar-params))
+  [params]
+  (b/create-jar (jar-params params)))
 
 (defn install
-  [_]
-  (b/install-jar (jar jar-params)))
+  [params]
+  (b/install-jar (jar params)))
 
 (defn deploy
-  [_params]
+  [params]
   (clean nil)
-  (-> jar-params
+  (-> (jar-params params)
       b/create-jar
       (assoc :sign-artifacts? false)
       b/deploy-jar))
 
 (defn codox
-  [_params]
-  (b/generate-codox jar-params))
+  [params]
+  (b/generate-codox (jar-params params)))
diff --git a/version.txt b/version.txt
deleted file mode 100644
index 3eefcb9..0000000
--- a/version.txt
+++ /dev/null
@@ -1 +0,0 @@
-1.0.0