diff --git a/testcases/src/main/scala/main.scala b/testcases/src/main/scala/main.scala
index 3d5d139..3c1df0e 100644
--- a/testcases/src/main/scala/main.scala
+++ b/testcases/src/main/scala/main.scala
@@ -1,5 +1,7 @@
 package guinep.compiletest
 
+import com.softwaremill.quicklens.*
+
 def upperCaseText(text: String): String =
   text.toUpperCase
 
@@ -134,6 +136,7 @@ def printsWeirdGADT1(g: WeirdGADT1[Int]): String = g match
 @main
 def run: Unit =
   guinep.web
+    .withModifyConfig(_.modify(_.httpServerConfig).using(_.port(6969)))
     .apply(
       upperCaseText,
       add,
diff --git a/web/src/main/scala/api.scala b/web/src/main/scala/api.scala
index 6bad335..a9c4dad 100644
--- a/web/src/main/scala/api.scala
+++ b/web/src/main/scala/api.scala
@@ -23,7 +23,8 @@ def web: GuinepWeb =
   * @param requireNonNullableInputs when set, all non-nullable types will correspond to required inputs in the frontend
   */
 case class GuinepWebConfig(
-  requireNonNullableInputs: Boolean = false
+  requireNonNullableInputs: Boolean = false,
+  httpServerConfig: zio.http.Server.Config = zio.http.Server.Config.default.port(8090)
 )
 
 object GuinepWebConfig:
@@ -56,7 +57,8 @@ private case class GuinepWeb(config: GuinepWebConfig = GuinepWebConfig.default)
         s"""|Duplicate function names found: ${functionsInfosMap.filter(_._2.size > 1).keys.mkString(", ")}
             |Ignoring duplicates""".stripMargin
       )
-    println("Starting GUInep web server at http://localhost:8090/")
+    val prettyAddress = config.httpServerConfig.address.getAddress().getHostAddress().toString() + ":" + config.httpServerConfig.address.getPort()
+    println(s"Starting GUInep web server at $prettyAddress")
     webgen.genWeb(
       funs = functionsInfos.distinct.map(fun => fun.name -> fun),
       config = config
diff --git a/web/src/main/scala/webgen.scala b/web/src/main/scala/webgen.scala
index 1a93a7d..3a2b822 100644
--- a/web/src/main/scala/webgen.scala
+++ b/web/src/main/scala/webgen.scala
@@ -53,6 +53,11 @@ private[guinep] object webgen {
     ).sandbox.toHttpApp
 
     def run =
-      Server.serve(app).provide(Server.defaultWithPort(8090))
+      Server
+        .serve(app)
+        .provide(
+          ZLayer.succeed(config.httpServerConfig),
+          Server.live 
+        )
   }
 }