diff --git a/core/src/main/kotlin/at/bitfire/davdroid/push/PushRegistrationManager.kt b/core/src/main/kotlin/at/bitfire/davdroid/push/PushRegistrationManager.kt
index 24c52f5d9..aae6093cc 100644
--- a/core/src/main/kotlin/at/bitfire/davdroid/push/PushRegistrationManager.kt
+++ b/core/src/main/kotlin/at/bitfire/davdroid/push/PushRegistrationManager.kt
@@ -34,8 +34,8 @@ import dagger.hilt.android.qualifiers.ApplicationContext
 import io.ktor.client.HttpClient
 import io.ktor.http.HttpHeaders
 import io.ktor.http.Url
+import io.ktor.http.content.TextContent
 import io.ktor.http.isSuccess
-import io.ktor.utils.io.ByteReadChannel
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
@@ -261,8 +261,7 @@ class PushRegistrationManager @Inject constructor(
         serializer.endDocument()
 
         DavCollection(httpClient, collection.url.toKtorUrl()).post(
-            { ByteReadChannel(writer.toString()) },
-            DavResource.MIME_XML_UTF8
+            TextContent(writer.toString(), DavResource.MIME_XML_UTF8)
         ) { response ->
             if (response.status.isSuccess()) {
                 // update subscription URL and expiration in DB
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 0993d9367..2a01f78d6 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -19,7 +19,7 @@ androidx-test-rules = "1.7.0"
 androidx-test-junit = "1.3.0"
 androidx-work = "2.11.1"
 bitfire-cert4android = "035dd99f7f"
-bitfire-dav4jvm = "77c5069f53"
+bitfire-dav4jvm = "a8acbff310"
 bitfire-synctools = "e9ff9948e3"
 compose-accompanist = "0.37.3"
 compose-bom = "2026.03.00"