diff --git a/pom.xml b/pom.xml
index a21b2bc..a340ad4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,11 +69,21 @@
             <artifactId>ktor-server-status-pages-jvm</artifactId>
             <version>${ktor.version}</version>
         </dependency>
+        <dependency>
+            <groupId>io.ktor</groupId>
+            <artifactId>ktor-server-call-logging-jvm</artifactId>
+            <version>${ktor.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-test-junit5</artifactId>
             <version>1.9.20-Beta2</version>
         </dependency>
+        <dependency>
+            <groupId>io.github.oshai</groupId>
+            <artifactId>kotlin-logging-jvm</artifactId>
+            <version>5.1.0</version>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/src/main/ApiUtil.kt b/src/main/ApiUtil.kt
index 2833cd7..5b16a5b 100644
--- a/src/main/ApiUtil.kt
+++ b/src/main/ApiUtil.kt
@@ -5,10 +5,13 @@ import com.powsybl.loadflow.LoadFlowParameters
 import com.powsybl.loadflow.json.JsonLoadFlowParameters
 import com.powsybl.nad.NetworkAreaDiagram
 import com.powsybl.sld.SingleLineDiagram
+import io.github.oshai.kotlinlogging.KotlinLogging
 import io.ktor.http.content.*
 import java.io.ByteArrayInputStream
 import java.io.StringWriter
 
+private val logger = KotlinLogging.logger {}
+
 fun busesFromRequest(
     type: String,
     body: ByteArray,
@@ -25,15 +28,30 @@ class FileContent(val name: String, val bytes: ByteArray)
 class LoadParameterContainer {
     var parameters = LoadFlowParameters()
     private var parametersModified = false
+
+    private fun currentVersion(): String {
+        return LoadFlowParameters.VERSION
+    }
+
+    private fun addVersionToJsonString(jsonString: String): String {
+        return "{\"version\": ${currentVersion()}," + jsonString.drop(1)
+    }
+
+    private fun hasVersion(jsonString: String): Boolean {
+        return jsonString.contains("version")
+    }
+
     private fun update(jsonString: String) {
-        this.parameters = JsonLoadFlowParameters.update(this.parameters, ByteArrayInputStream(jsonString.toByteArray()))
+        val jsonStringWithVersion = if (hasVersion(jsonString)) jsonString else addVersionToJsonString(jsonString)
+        this.parameters = JsonLoadFlowParameters.update(this.parameters, jsonStringWithVersion.byteInputStream())
         this.parametersModified = true
     }
 
     fun formItemHandler(part: PartData.FormItem) {
         val name = part.name ?: ""
-        if (name == "load-parameters") {
+        if (name == "load-flow-parameters") {
             this.update(part.value)
+            logger.info { "Received load flow parameters: ${part.value}" }
         }
     }
 }
diff --git a/src/main/App.kt b/src/main/App.kt
index 7085944..f357254 100644
--- a/src/main/App.kt
+++ b/src/main/App.kt
@@ -1,9 +1,9 @@
 package com.github.statnett.loadflowservice
 
-import com.powsybl.commons.PowsyblException
 import io.ktor.http.*
 import io.ktor.serialization.kotlinx.json.*
 import io.ktor.server.application.*
+import io.ktor.server.plugins.callloging.*
 import io.ktor.server.plugins.contentnegotiation.*
 import io.ktor.server.plugins.cors.routing.*
 import io.ktor.server.plugins.statuspages.*
@@ -30,6 +30,8 @@ fun Application.module() {
         }
     }
 
+    install(CallLogging)
+
     routing {
         get("/") {
             call.respondText("Hello, world!")
diff --git a/src/main/Solver.kt b/src/main/Solver.kt
index e8477b8..04bcadf 100644
--- a/src/main/Solver.kt
+++ b/src/main/Solver.kt
@@ -2,7 +2,6 @@ package com.github.statnett.loadflowservice
 
 import com.powsybl.cgmes.conversion.CgmesImport
 import com.powsybl.ieeecdf.converter.IeeeCdfImporter
-import com.powsybl.iidm.network.ImportersLoader
 import com.powsybl.iidm.network.ImportersLoaderList
 import com.powsybl.iidm.network.Network
 import com.powsybl.iidm.xml.XMLImporter
diff --git a/src/test/AppTest.kt b/src/test/AppTest.kt
index 496a467..761cec6 100644
--- a/src/test/AppTest.kt
+++ b/src/test/AppTest.kt
@@ -135,6 +135,47 @@ class ApplicationTest {
             )
         }
 
+    @Test
+    fun `test dc solve ok`() =
+        testApplication {
+            val formData = formDataFromFile(ieeeCdfNetwork14File())
+            val loadParams = formData {
+                append("load-flow-parameters", "{\"dc\": true}")
+            }
+
+            val response = client.submitFormWithBinaryData(
+                url = "/run-load-flow",
+                formData = formData + loadParams
+            )
+
+            val body = response.bodyAsText()
+            assertEquals(HttpStatusCode.OK, response.status)
+
+            val regex = Regex("\"isOk\":([^,]+)")
+            val match = regex.find(body)!!
+            val solveStatus = match.groupValues[1].toBoolean()
+            assertTrue(solveStatus)
+        }
+
+    @Test
+    fun `test descriptive response on incompatible version of load parameters`() =
+        testApplication {
+            val formData = formDataFromFile(ieeeCdfNetwork14File())
+            val loadParams = formData {
+                append("load-flow-parameters", "{\"version\":\"1.0\",\"dc\": true}")
+            }
+
+            val response = client.submitFormWithBinaryData(
+                url = "/run-load-flow",
+                formData = formData + loadParams
+            )
+            val body = response.bodyAsText()
+            assertEquals(HttpStatusCode.InternalServerError, response.status)
+
+            // dc flag was introduced in v1.4
+            assertTrue(body.contains(">= 1.4"))
+        }
+
     @Test
     fun `test response ok network`() =
         testApplication {