diff --git a/.env b/.env
index 1a68c2a..49bcda7 100644
--- a/.env
+++ b/.env
@@ -1 +1 @@
-KAFKA_CONFLUENT_VERSION=7.5.0
+KAFKA_CONFLUENT_VERSION=7.6.0
diff --git a/buildSrc/src/main/kotlin/Versions.kt b/buildSrc/src/main/kotlin/Versions.kt
index df6cbed..1bfd5c0 100644
--- a/buildSrc/src/main/kotlin/Versions.kt
+++ b/buildSrc/src/main/kotlin/Versions.kt
@@ -22,6 +22,4 @@ object Versions {
     const val mockitoKotlin = "5.3.1"
     const val grizzly = "4.0.2"
     const val hamcrest = "2.2"
-
-    const val wrapper = "8.4"
 }
diff --git a/radar-gateway/src/integrationTest/docker/.env b/radar-gateway/src/integrationTest/docker/.env
index 1aab4c4..4bcbc8b 100644
--- a/radar-gateway/src/integrationTest/docker/.env
+++ b/radar-gateway/src/integrationTest/docker/.env
@@ -1,2 +1,2 @@
-KAFKA_CONFLUENT_VERSION=7.5.0
+KAFKA_CONFLUENT_VERSION=7.6.0
 RADAR_GATEWAY_TAG=SNAPSHOT
diff --git a/radar-gateway/src/integrationTest/kotlin/org/radarbase/gateway/resource/KafkaTopicsTest.kt b/radar-gateway/src/integrationTest/kotlin/org/radarbase/gateway/resource/KafkaTopicsTest.kt
index e4ffc01..42f5858 100644
--- a/radar-gateway/src/integrationTest/kotlin/org/radarbase/gateway/resource/KafkaTopicsTest.kt
+++ b/radar-gateway/src/integrationTest/kotlin/org/radarbase/gateway/resource/KafkaTopicsTest.kt
@@ -78,7 +78,7 @@ class KafkaTopicsTest {
         }
 
         val retriever = schemaRetriever(SCHEMA_REGISTRY_URL) {
-            httpClient {
+            httpClient = HttpClient(CIO) {
                 timeout(10.seconds)
             }
         }
diff --git a/radar-gateway/src/main/kotlin/org/radarbase/gateway/inject/SchemaRetrieverFactory.kt b/radar-gateway/src/main/kotlin/org/radarbase/gateway/inject/SchemaRetrieverFactory.kt
index f73880b..cb4336c 100644
--- a/radar-gateway/src/main/kotlin/org/radarbase/gateway/inject/SchemaRetrieverFactory.kt
+++ b/radar-gateway/src/main/kotlin/org/radarbase/gateway/inject/SchemaRetrieverFactory.kt
@@ -14,7 +14,6 @@ import org.radarbase.gateway.config.GatewayConfig
 import org.radarbase.producer.io.timeout
 import org.radarbase.producer.schema.SchemaRetriever
 import org.radarbase.producer.schema.SchemaRetriever.Companion.schemaRetriever
-import org.slf4j.LoggerFactory
 import java.util.function.Supplier
 import kotlin.time.Duration.Companion.seconds
 
@@ -35,10 +34,10 @@ class SchemaRetrieverFactory(
                 ?: config.kafka.serialization[USER_INFO_CONFIG].asNonEmptyString()
 
         return schemaRetriever(baseUrl = server.urlString) {
-            if (basicCredentials != null && basicCredentials.contains(':')) {
-                val (apiKey, apiSecret) = basicCredentials.split(':', limit = 2)
-                httpClient = HttpClient(CIO) {
-                    timeout(30.seconds)
+            httpClient = HttpClient(CIO) {
+                timeout(30.seconds)
+                if (basicCredentials != null && basicCredentials.contains(':')) {
+                    val (apiKey, apiSecret) = basicCredentials.split(':', limit = 2)
                     install(Auth) {
                         basic {
                             sendWithoutRequest { true }
@@ -54,6 +53,5 @@ class SchemaRetrieverFactory(
 
     companion object {
         private fun Any?.asNonEmptyString(): String? = (this as? String)?.takeIf { it.isNotEmpty() }
-        private val logger = LoggerFactory.getLogger(SchemaRetrieverFactory::class.java)
     }
 }