diff --git a/src/main/kotlin/io/gitlab/jfronny/sdom/SDom.kt b/src/main/kotlin/io/gitlab/jfronny/sdom/SDom.kt
index 380ddda..7eefa14 100644
--- a/src/main/kotlin/io/gitlab/jfronny/sdom/SDom.kt
+++ b/src/main/kotlin/io/gitlab/jfronny/sdom/SDom.kt
@@ -43,6 +43,17 @@ object SDom {
                 ignoreUnknownKeys = true
             })
         }
+    }
+
+    private val authenticatedClient = HttpClient(Java) {
+        engine {
+            protocolVersion = java.net.http.HttpClient.Version.HTTP_2
+        }
+        install(ContentNegotiation) {
+            json(Json {
+                ignoreUnknownKeys = true
+            })
+        }
         install(Auth) {
             basic {
                 credentials {
@@ -115,7 +126,7 @@ object SDom {
     var judgementTypes: Map<String, SDJudgementType>? = null
 
     suspend fun getContests() {
-        val result = client.get(SDCredentials.url) {
+        val result = authenticatedClient.get(SDCredentials.url) {
             url {
                 appendPathSegments("contests")
             }
@@ -149,7 +160,7 @@ object SDom {
 
     suspend fun getProblems() {
         if (currentContest == null) return
-        val result = client.get(SDCredentials.url) {
+        val result = authenticatedClient.get(SDCredentials.url) {
             url {
                 appendPathSegments("contests", currentContest!!.id, "problems")
             }
@@ -161,7 +172,7 @@ object SDom {
                 currentProblem = null
             }
         }
-        judgementTypes = client.get(SDCredentials.url) {
+        judgementTypes = authenticatedClient.get(SDCredentials.url) {
             url {
                 appendPathSegments("contests", currentContest!!.id, "judgement-types")
             }
@@ -176,7 +187,7 @@ object SDom {
         val resultFlow: MutableSharedFlow<Result<SDJudgement>> = MutableSharedFlow()
         launch {
             try {
-                val response: SDSubmission = client.post(SDCredentials.url) {
+                val response: SDSubmission = authenticatedClient.post(SDCredentials.url) {
                     url {
                         appendPathSegments("contests", contest.id, "submissions")
                     }
@@ -199,7 +210,7 @@ object SDom {
                     return@launch
                 }
                 do {
-                    val result: List<SDJudgement> = client.get(SDCredentials.url) {
+                    val result: List<SDJudgement> = authenticatedClient.get(SDCredentials.url) {
                         url {
                             appendPathSegments("contests", contest.id, "judgements")
                             parameters.append("submission_id", response.id)