diff --git a/build.gradle.kts b/build.gradle.kts
index f9c71dbe..90b6d112 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = "io.github.smiley4"
-version = "0.5.1"
+version = "0.5.2"
 
 repositories {
     mavenCentral()
diff --git a/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerPlugin.kt b/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerPlugin.kt
index 4bf6559c..b773480c 100644
--- a/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerPlugin.kt
+++ b/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerPlugin.kt
@@ -44,6 +44,7 @@ val SwaggerUI = createApplicationPlugin(name = "SwaggerUI", createConfiguration
         pluginConfig.getSwaggerUI().swaggerUrl,
         pluginConfig.getSwaggerUI().forwardRoot,
         pluginConfig.getSwaggerUI().authentication,
+        application.environment.config,
         SWAGGER_UI_WEBJARS_VERSION,
     ) { apiSpecJson }.setup(application)
 
diff --git a/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerRouting.kt b/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerRouting.kt
index cd24eea3..c21d6af3 100644
--- a/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerRouting.kt
+++ b/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerRouting.kt
@@ -3,6 +3,7 @@ package io.github.smiley4.ktorswaggerui
 import io.ktor.server.application.Application
 import io.ktor.server.application.call
 import io.ktor.server.auth.authenticate
+import io.ktor.server.config.ApplicationConfig
 import io.ktor.server.response.respondRedirect
 import io.ktor.server.routing.Route
 import io.ktor.server.routing.get
@@ -17,6 +18,7 @@ class SwaggerRouting(
     private val swaggerUrl: String,
     private val forwardRoot: Boolean,
     private val authentication: String?,
+    appConfig: ApplicationConfig,
     swaggerWebjarVersion: String,
     jsonSpecProvider: () -> String
 ) {
@@ -25,10 +27,22 @@ class SwaggerRouting(
 
     private val controller = SwaggerController(
         swaggerWebjarVersion = swaggerWebjarVersion,
-        apiSpecUrl = "/" + (if (swaggerUrl.startsWith("/")) swaggerUrl.substring(1) else swaggerUrl) + "/api.json",
+        apiSpecUrl = getApiSpecUrl(appConfig),
         jsonSpecProvider = jsonSpecProvider
     )
 
+    private fun getApiSpecUrl(appConfig: ApplicationConfig): String {
+        val rootPath = appConfig.propertyOrNull("ktor.deployment.rootPath")?.getString()?.let { "/${dropSlashes(it)}" } ?: ""
+        return "$rootPath/${dropSlashes(swaggerUrl)}/api.json"
+    }
+
+    private fun dropSlashes(str: String): String {
+        var value = str
+        value = if (value.startsWith("/")) value.substring(1) else value
+        value = if (value.endsWith("/")) value.substring(0, value.length - 1) else value
+        return value
+    }
+
 
     /**
      * registers the required routes
diff --git a/src/test/kotlin/io/github/smiley4/ktorswaggerui/examples/RootPathExample.kt b/src/test/kotlin/io/github/smiley4/ktorswaggerui/examples/RootPathExample.kt
new file mode 100644
index 00000000..97fd559d
--- /dev/null
+++ b/src/test/kotlin/io/github/smiley4/ktorswaggerui/examples/RootPathExample.kt
@@ -0,0 +1,47 @@
+package io.github.smiley4.ktorswaggerui.examples
+
+import io.github.smiley4.ktorswaggerui.SwaggerUI
+import io.github.smiley4.ktorswaggerui.dsl.get
+import io.ktor.http.HttpStatusCode
+import io.ktor.server.application.Application
+import io.ktor.server.application.call
+import io.ktor.server.application.install
+import io.ktor.server.netty.EngineMain
+import io.ktor.server.response.respondText
+import io.ktor.server.routing.routing
+
+
+fun main(args: Array<String>): Unit = EngineMain.main(args)
+
+fun Application.module() {
+
+    install(SwaggerUI) {
+        swagger {
+            swaggerUrl = "swagger-ui"
+            forwardRoot = true
+        }
+        info {
+            title = "Example API"
+            version = "latest"
+            description = "Example api for testing"
+        }
+        server {
+            url = "http://localhost:8080"
+            description = "Development server"
+        }
+    }
+
+    routing {
+        get("hello", {
+            description = "Simple 'Hello World'- Route"
+            response {
+                HttpStatusCode.OK to {
+                    description = "Successful Response"
+                }
+            }
+        }) {
+            call.respondText("Hello World!")
+        }
+    }
+}
+
diff --git a/src/test/resources/application.conf b/src/test/resources/application.conf
new file mode 100644
index 00000000..a04928e5
--- /dev/null
+++ b/src/test/resources/application.conf
@@ -0,0 +1,10 @@
+ktor {
+	deployment {
+		host = "localhost"
+		port = 8080
+		rootPath = "/root"
+	}
+	application {
+		modules = [io.github.smiley4.ktorswaggerui.examples.RootPathExampleKt.module]
+	}
+}
\ No newline at end of file