diff --git a/.github/workflows/develop.yml b/.github/workflows/develop.yml
new file mode 100644
index 0000000..290d149
--- /dev/null
+++ b/.github/workflows/develop.yml
@@ -0,0 +1,16 @@
+name: develop
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v4
+        with:
+          go-version: '1.21'
+      - name: Make
+        run: ./cmd/develop.sh
+      - name: Test
+        run: go test -v -p 1 ./...
diff --git a/go.mod b/go.mod
index 87a1746..e9ed755 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/mohanson/daze
 
-go 1.20
+go 1.21
 
 require (
 	github.com/godump/doa v0.1.3
diff --git a/protocol/ashe/engine_test.go b/protocol/ashe/engine_test.go
index 2eafc8d..b8e2bd6 100644
--- a/protocol/ashe/engine_test.go
+++ b/protocol/ashe/engine_test.go
@@ -10,7 +10,7 @@ import (
 
 const (
 	EchoServerListenOn = "127.0.0.1:28080"
-	DazeServerListenOn = "127.0.0.1:21081"
+	DazeServerListenOn = "127.0.0.1:28081"
 	Password           = "password"
 )
 
diff --git a/protocol/baboon/engine_test.go b/protocol/baboon/engine_test.go
index c1784ab..76f0f5c 100644
--- a/protocol/baboon/engine_test.go
+++ b/protocol/baboon/engine_test.go
@@ -12,7 +12,7 @@ import (
 
 const (
 	EchoServerListenOn = "127.0.0.1:28080"
-	DazeServerListenOn = "127.0.0.1:21081"
+	DazeServerListenOn = "127.0.0.1:28081"
 	Password           = "password"
 )
 
diff --git a/protocol/czar/engine_test.go b/protocol/czar/engine_test.go
index b85c8d2..dd88a44 100644
--- a/protocol/czar/engine_test.go
+++ b/protocol/czar/engine_test.go
@@ -10,7 +10,7 @@ import (
 
 const (
 	EchoServerListenOn = "127.0.0.1:28080"
-	DazeServerListenOn = "127.0.0.1:21081"
+	DazeServerListenOn = "127.0.0.1:28081"
 	Password           = "password"
 )
 
diff --git a/protocol/dahlia/engine_test.go b/protocol/dahlia/engine_test.go
index a62043a..8660995 100644
--- a/protocol/dahlia/engine_test.go
+++ b/protocol/dahlia/engine_test.go
@@ -10,7 +10,7 @@ import (
 
 const (
 	EchoServerListenOn = "127.0.0.1:28080"
-	DazeServerListenOn = "127.0.0.1:21081"
+	DazeServerListenOn = "127.0.0.1:28081"
 	DazeClientListenOn = "127.0.0.1:21082"
 	Password           = "password"
 )