diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 00000000..e96bb1bd
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,26 @@
+name: Publish to Hangar and Modrinth
+on:
+  push:
+    branches:
+      - master
+      - dev
+
+jobs:
+  publish:
+    if: github.repository_owner == 'ViaVersion'
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+      - name: Validate Gradle Wrapper
+        uses: gradle/wrapper-validation-action@v1
+      - name: Set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: 17
+      - name: Publish
+        env:
+          HANGAR_TOKEN: ${{ secrets.HANGAR_TOKEN }}
+          MODRINTH_TOKEN: ${{ secrets.MODRINTH_TOKEN }}
+        run: ./gradlew publishAllPublicationsToHangar # add 'modrinth' after it is approved
diff --git a/build-logic/src/main/kotlin/extensions.kt b/build-logic/src/main/kotlin/extensions.kt
index c55b057b..7fb95ba0 100644
--- a/build-logic/src/main/kotlin/extensions.kt
+++ b/build-logic/src/main/kotlin/extensions.kt
@@ -38,6 +38,24 @@ fun Project.latestCommitHash(): String {
     return byteOut.toString(Charsets.UTF_8.name()).trim()
 }
 
+fun Project.lastCommitMessage(): String {
+    val byteOut = ByteArrayOutputStream()
+    exec {
+        commandLine = listOf("git", "log", "-1", "--pretty=%B")
+        standardOutput = byteOut
+    }
+    return byteOut.toString(Charsets.UTF_8.name()).trim()
+}
+
+fun Project.branchName(): String {
+    val byteOut = ByteArrayOutputStream()
+    exec {
+        commandLine = listOf("git", "branch")
+        standardOutput = byteOut
+    }
+    return byteOut.toString(Charsets.UTF_8.name()).trim()
+}
+
 fun JavaPluginExtension.javaTarget(version: Int) {
     sourceCompatibility = JavaVersion.toVersion(version)
     targetCompatibility = JavaVersion.toVersion(version)
diff --git a/build.gradle.kts b/build.gradle.kts
index 583ad5e3..f84d0b0a 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -5,7 +5,7 @@ plugins {
 
 allprojects {
     group = "com.viaversion"
-    version = "4.8.0-23w32a-SNAPSHOT"
+    version = property("projectVersion") as String // from gradle.properties
     description = "Allow older clients to join newer server versions."
 }
 
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 00000000..914ae341
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,5 @@
+projectVersion=4.8.0-23w32a-SNAPSHOT
+mcVersions=1.20.1, 1.19.4, 1.18.2, 1.17.1, 1.16.5, 1.15.2, 1.14.4, 1.8.9
+mcVersionRange=1.10-1.20.1
+waterfallVersion=1.20
+velocityVersion=3.2
\ No newline at end of file
diff --git a/universal/build.gradle.kts b/universal/build.gradle.kts
index 9347643d..bb1c1b99 100644
--- a/universal/build.gradle.kts
+++ b/universal/build.gradle.kts
@@ -1,7 +1,10 @@
 import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+import io.papermc.hangarpublishplugin.model.Platforms
 
 plugins {
     id("com.github.johnrengelman.shadow")
+    id("io.papermc.hangar-publish-plugin") version "0.0.5"
+    id("com.modrinth.minotaur") version "2.+"
 }
 
 val platforms = setOf(
@@ -39,3 +42,69 @@ tasks {
 }
 
 publishShadowJar()
+
+val branch = rootProject.branchName()
+val isMainBranch = branch == "master"
+val ver = (project.version as String) + "+" + System.getenv("GITHUB_RUN_NUMBER")
+val changelogContent = rootProject.lastCommitMessage()
+modrinth {
+    val mcVersions: List<String> = (property("mcVersions") as String)
+            .split(",")
+            .map { it.trim() }
+    token.set(System.getenv("MODRINTH_TOKEN"))
+    projectId.set("viabackwards")
+    versionType.set(if (isMainBranch) "beta" else "alpha")
+    versionNumber.set(ver)
+    versionName.set("[$branch] $ver")
+    changelog.set(changelogContent)
+    uploadFile.set(tasks.shadowJar.flatMap { it.archiveFile })
+    gameVersions.set(mcVersions)
+    loaders.add("fabric")
+    autoAddDependsOn.set(false)
+    detectLoaders.set(false)
+    dependencies {
+        optional.project("viafabric")
+        optional.project("viafabricplus")
+    }
+}
+
+if (isMainBranch) { // Don't spam releases until Hangar has per channel notifications
+    hangarPublish {
+        publications.register("plugin") {
+            version.set(ver)
+            namespace("ViaVersion", "ViaBackwards")
+            channel.set(if (isMainBranch) "Snapshot" else "Alpha")
+            changelog.set(changelogContent)
+            apiKey.set(System.getenv("HANGAR_TOKEN"))
+            platforms {
+                register(Platforms.PAPER) {
+                    jar.set(tasks.shadowJar.flatMap { it.archiveFile })
+                    platformVersions.set(listOf(property("mcVersionRange") as String))
+                    dependencies {
+                        hangar("ViaVersion", "ViaVersion") {
+                            required.set(true)
+                        }
+                    }
+                }
+                register(Platforms.VELOCITY) {
+                    jar.set(tasks.shadowJar.flatMap { it.archiveFile })
+                    platformVersions.set(listOf(property("velocityVersion") as String))
+                    dependencies {
+                        hangar("ViaVersion", "ViaVersion") {
+                            required.set(true)
+                        }
+                    }
+                }
+                register(Platforms.WATERFALL) {
+                    jar.set(tasks.shadowJar.flatMap { it.archiveFile })
+                    platformVersions.set(listOf(property("waterfallVersion") as String))
+                    dependencies {
+                        hangar("ViaVersion", "ViaVersion") {
+                            required.set(true)
+                        }
+                    }
+                }
+            }
+        }
+    }
+}