diff --git a/faunadb-common/src/main/java/com/faunadb/common/Connection.java b/faunadb-common/src/main/java/com/faunadb/common/Connection.java
index 28884619..01c09542 100644
--- a/faunadb-common/src/main/java/com/faunadb/common/Connection.java
+++ b/faunadb-common/src/main/java/com/faunadb/common/Connection.java
@@ -33,7 +33,13 @@
  *
  * <p>Relies on {@link java.net.http.HttpClient}
  * for the underlying implementation.</p>
+ *
+ * @deprecated
+ * Fauna is decommissioning FQL v4 on June 30, 2025. This driver is not compatible with FQL v10.
+ * Fauna accounts created after August 21, 2024 must use FQL v10.
+ * Ensure you migrate existing projects to the official v10 driver by the v4 EOL date: https://github.com/fauna/fauna-jvm.
  */
+@Deprecated(since = "4.5.1")
 public class Connection {
 
   private static final String API_VERSION = "4";
diff --git a/faunadb-java/src/main/java/com/faunadb/client/FaunaClient.java b/faunadb-java/src/main/java/com/faunadb/client/FaunaClient.java
index ef157dc7..60ed5ed0 100644
--- a/faunadb-java/src/main/java/com/faunadb/client/FaunaClient.java
+++ b/faunadb-java/src/main/java/com/faunadb/client/FaunaClient.java
@@ -65,7 +65,13 @@
  * </pre>
  *
  * @see com.faunadb.client.query.Language
+ *
+ * @deprecated
+ * Fauna is decommissioning FQL v4 on June 30, 2025. This driver is not compatible with FQL v10.
+ * Fauna accounts created after August 21, 2024 must use FQL v10.
+ * Ensure you migrate existing projects to the official v10 driver by the v4 EOL date: https://github.com/fauna/fauna-jvm.
  */
+@Deprecated(since = "4.5.1")
 public class FaunaClient {
 
   /**
diff --git a/faunadb-java/src/main/java/com/faunadb/client/types/MetricsResponse.java b/faunadb-java/src/main/java/com/faunadb/client/types/MetricsResponse.java
index 7f958fd9..ec1b7b31 100644
--- a/faunadb-java/src/main/java/com/faunadb/client/types/MetricsResponse.java
+++ b/faunadb-java/src/main/java/com/faunadb/client/types/MetricsResponse.java
@@ -51,12 +51,10 @@ public enum Metrics {
         QUERY_BYTES_IN("x-query-bytes-in"),
         QUERY_BYTES_OUT("x-query-bytes-out"),
         QUERY_TIME("x-query-time"),
-        READ_OPS("x-read-ops"),
         STORAGE_BYTES_READ("x-storage-bytes-read"),
         STORAGE_BYTES_WRITE("x-storage-bytes-write"),
         TXN_RETRIES("x-txn-retries"),
-        TXN_TIME("x-txn-time"),
-        WRITE_OPS("x-write-ops");
+        TXN_TIME("x-txn-time");
 
         private final String metric;
 
diff --git a/faunadb-java/src/test/java/com/faunadb/client/ClientSpec.java b/faunadb-java/src/test/java/com/faunadb/client/ClientSpec.java
index 9dcb26d1..85fc03e6 100644
--- a/faunadb-java/src/test/java/com/faunadb/client/ClientSpec.java
+++ b/faunadb-java/src/test/java/com/faunadb/client/ClientSpec.java
@@ -325,12 +325,10 @@ public void shouldReturnMetricsData() throws Exception {
     Optional<String> queryBytesIn = metricsResponse.getMetric(MetricsResponse.Metrics.QUERY_BYTES_IN);
     Optional<String> queryBytesOut = metricsResponse.getMetric(MetricsResponse.Metrics.QUERY_BYTES_OUT);
     Optional<String> queryTime = metricsResponse.getMetric(MetricsResponse.Metrics.QUERY_TIME);
-    Optional<String> readOps = metricsResponse.getMetric(MetricsResponse.Metrics.READ_OPS);
     Optional<String> storageBytesRead = metricsResponse.getMetric(MetricsResponse.Metrics.STORAGE_BYTES_READ);
     Optional<String> storageBytesWrite = metricsResponse.getMetric(MetricsResponse.Metrics.STORAGE_BYTES_WRITE);
     Optional<String> txnRetries = metricsResponse.getMetric(MetricsResponse.Metrics.TXN_RETRIES);
     Optional<String> txnTime = metricsResponse.getMetric(MetricsResponse.Metrics.TXN_TIME);
-    Optional<String> writeOps = metricsResponse.getMetric(MetricsResponse.Metrics.WRITE_OPS);
 
     assertThat(byteReadOps.isPresent(), is(true));
     assertThat(byteWriteOps.isPresent(), is(true));
@@ -339,12 +337,10 @@ public void shouldReturnMetricsData() throws Exception {
     assertThat(queryBytesIn.isPresent(), is(true));
     assertThat(queryBytesOut.isPresent(), is(true));
     assertThat(queryTime.isPresent(), is(true));
-    assertThat(readOps.isPresent(), is(true));
     assertThat(storageBytesRead.isPresent(), is(true));
     assertThat(storageBytesWrite.isPresent(), is(true));
     assertThat(txnRetries.isPresent(), is(true));
     assertThat(txnTime.isPresent(), is(true));
-    assertThat(writeOps.isPresent(), is(true));
   }
 
   @Test
@@ -3171,7 +3167,7 @@ public void streamFailsIfTargetDoesNotExist() throws Exception {
   @Test
   public void streamFailsIfQueryIsNotReadOnly() throws Exception {
     thrown.expectCause(isA(BadRequestException.class));
-    thrown.expectMessage(containsString("invalid expression: Write effect in read-only query expression."));
+    thrown.expectMessage(containsString("invalid expression: Call performs a write, which is not allowed in stream requests."));
 
     adminClient.stream(CreateCollection(Collection("spells"))).get();
   }
diff --git a/faunadb-scala/src/main/scala/faunadb/FaunaClient.scala b/faunadb-scala/src/main/scala/faunadb/FaunaClient.scala
index a1c521f6..f76b05df 100644
--- a/faunadb-scala/src/main/scala/faunadb/FaunaClient.scala
+++ b/faunadb-scala/src/main/scala/faunadb/FaunaClient.scala
@@ -25,7 +25,19 @@ import scala.compat.java8.OptionConverters._
 import scala.concurrent.duration.FiniteDuration
 import scala.concurrent.{ExecutionContext, Future}
 
-/** Companion object to the FaunaClient class. */
+/**
+  * Companion object to the FaunaClient class.
+  *
+  * @deprecated
+  * Fauna is decommissioning FQL v4 on June 30, 2025. This driver is not compatible with FQL v10.
+  * Fauna accounts created after August 21, 2024 must use FQL v10.
+  * Ensure you migrate existing projects to the official v10 driver by the v4 EOL date: https://github.com/fauna/fauna-jvm.
+  */
+@deprecated("Fauna is decommissioning FQL v4 on June 30, 2025. This driver is not compatible with FQL v10. " +
+  "Fauna accounts created after August 21, 2024 must use FQL v10. " +
+  "Ensure you migrate existing projects to the official v10 driver by the v4 EOL date: https://github.com/fauna/fauna-jvm.",
+  "4.5.1"
+)
 object FaunaClient {
 
   // singleton ObjectMapper for all clients
@@ -43,7 +55,17 @@ object FaunaClient {
     *                     milliseconds precision. If not provided, a default timeout value is set on the server side.
     * @param userAgent A value used for the User-Agent HTTP header.
     * @return A configured FaunaClient instance.
+    *
+    * @deprecated
+    * Fauna is decommissioning FQL v4 on June 30, 2025. This driver is not compatible with FQL v10.
+    * Fauna accounts created after August 21, 2024 must use FQL v10.
+    * Ensure you migrate existing projects to the official v10 driver by the v4 EOL date: https://github.com/fauna/fauna-jvm.
     */
+  @deprecated("Fauna is decommissioning FQL v4 on June 30, 2025. This driver is not compatible with FQL v10. " +
+    "Fauna accounts created after August 21, 2024 must use FQL v10. " +
+    "Ensure you migrate existing projects to the official v10 driver by the v4 EOL date: https://github.com/fauna/fauna-jvm.",
+    "4.5.1"
+  )
   def apply(
     secret: String = null,
     endpoint: String = null,
@@ -105,7 +127,17 @@ object FaunaClient {
   * }}}
   *
   * @constructor create a new client with a configured [[com.faunadb.common.Connection]].
+  *
+  * @deprecated
+  * Fauna is decommissioning FQL v4 on June 30, 2025. This driver is not compatible with FQL v10.
+  * Fauna accounts created after August 21, 2024 must use FQL v10.
+  * Ensure you migrate existing projects to the official v10 driver by the v4 EOL date: https://github.com/fauna/fauna-jvm.
   */
+@deprecated("Fauna is decommissioning FQL v4 on June 30, 2025. This driver is not compatible with FQL v10. " +
+  "Fauna accounts created after August 21, 2024 must use FQL v10. " +
+  "Ensure you migrate existing projects to the official v10 driver by the v4 EOL date: https://github.com/fauna/fauna-jvm.",
+  "4.5.1"
+)
 class FaunaClient private (connection: Connection) {
 
   /**
diff --git a/faunadb-scala/src/main/scala/faunadb/values/Metrics.scala b/faunadb-scala/src/main/scala/faunadb/values/Metrics.scala
index 43993170..6902c5a6 100644
--- a/faunadb-scala/src/main/scala/faunadb/values/Metrics.scala
+++ b/faunadb-scala/src/main/scala/faunadb/values/Metrics.scala
@@ -10,12 +10,10 @@ object Metrics extends Enumeration {
   val QueryBytesIn = Value("x-query-bytes-in")
   val QueryBytesOut = Value("x-query-bytes-out")
   val QueryTime = Value("x-query-time")
-  val ReadOps = Value("x-read-ops")
   val StorageBytesRead = Value("x-storage-bytes-read")
   val StorageBytesWrite = Value("x-storage-bytes-write")
   val TxnRetries = Value("x-txn-retries")
   val TxnTime = Value("x-txn-time")
-  val WriteOps = Value("x-write-ops")
 
   val All = values.toList
 }
diff --git a/faunadb-scala/src/test/scala/faunadb/ClientSpec.scala b/faunadb-scala/src/test/scala/faunadb/ClientSpec.scala
index 1f125e2c..b9f3efc6 100644
--- a/faunadb-scala/src/test/scala/faunadb/ClientSpec.scala
+++ b/faunadb-scala/src/test/scala/faunadb/ClientSpec.scala
@@ -524,12 +524,10 @@ class ClientSpec
     val queryBytesIn = metricsResponse.getMetric(Metrics.QueryBytesIn)
     val queryBytesOut = metricsResponse.getMetric(Metrics.QueryBytesOut)
     val queryTime = metricsResponse.getMetric(Metrics.QueryTime)
-    val readOps = metricsResponse.getMetric(Metrics.ReadOps)
     val storageBytesRead = metricsResponse.getMetric(Metrics.StorageBytesRead)
     val storageBytesWrite = metricsResponse.getMetric(Metrics.StorageBytesWrite)
     val txnRetries = metricsResponse.getMetric(Metrics.TxnRetries)
     val txnTime = metricsResponse.getMetric(Metrics.TxnTime)
-    val writeOps = metricsResponse.getMetric(Metrics.WriteOps)
 
     byteReadOps.isDefined should equal (true)
     byteWriteOps.isDefined should equal (true)
@@ -538,12 +536,10 @@ class ClientSpec
     queryBytesIn.isDefined should equal (true)
     queryBytesOut.isDefined should equal (true)
     queryTime.isDefined should equal (true)
-    readOps.isDefined should equal (true)
     storageBytesRead.isDefined should equal (true)
     storageBytesWrite.isDefined should equal (true)
     txnRetries.isDefined should equal (true)
     txnTime.isDefined should equal (true)
-    writeOps.isDefined should equal (true)
   }
 
   it should "paginate with cursor object" in {
@@ -2163,7 +2159,7 @@ class ClientSpec
   it should "stream return error if the query is not readonly" in {
     val err = client.stream(Create(Collection("spells"), Obj("data" -> Obj("testField" -> "testValue0")))).failed.futureValue
     err shouldBe a[BadRequestException]
-    err.getMessage should include("Write effect in read-only query expression.")
+    err.getMessage should include("Call performs a write, which is not allowed in stream requests.")
   }
 
   it should "stream on document reference contains `document` field by default" in {
diff --git a/project/Settings.scala b/project/Settings.scala
index 11a949bf..8e62978e 100644
--- a/project/Settings.scala
+++ b/project/Settings.scala
@@ -6,7 +6,7 @@ import scoverage.ScoverageSbtPlugin.autoImport._
 
 object Settings {
 
-  lazy val driverVersion = "4.5.0"
+  lazy val driverVersion = "4.5.1"
 
   lazy val scala211 = "2.11.12"
   lazy val scala212 = "2.12.14"
@@ -61,6 +61,11 @@ object Settings {
           <organizationUrl>https://fauna.com</organizationUrl>
         </developer>
       </developers>
+      <deprecated>true</deprecated>
+      <deprecation>
+        <message>v4 EOL notice</message>
+        <since>4.5.1</since>
+      </deprecation>
     ),
     usePgpKeyHex(sys.env.getOrElse("GPG_SIGNING_KEY", "0")),
     pgpPassphrase := sys.env.get("GPG_PASSPHRASE") map (_.toArray),