Document Reactive Streams dependency in manual
diff --git a/manual/core/integration/README.md b/manual/core/integration/README.md
index f4c8fe5..3711979 100644
--- a/manual/core/integration/README.md
+++ b/manual/core/integration/README.md
@@ -522,6 +522,27 @@
(e.g. 3.3.0 vs 3.3.3) could introduce incompatibilities. So do not declare an explicit dependency in
your application, let the driver pull it transitively.
+#### Reactive Streams
+
+[Reactive Streams](https://www.reactive-streams.org/) types are referenced in our [reactive
+API](../reactive/).
+
+If you never call any of the `executeReactive` methods, you can exclude the dependency:
+
+```xml
+<dependency>
+ <groupId>com.datastax.oss</groupId>
+ <artifactId>java-driver-core</artifactId>
+ <version>${driver.version}</version>
+ <exclusions>
+ <exclusion>
+ <groupId>org.reactivestreams</groupId>
+ <artifactId>reactive-streams</artifactId>
+ </exclusion>
+ </exclusions>
+</dependency>
+```
+
#### Documenting annotations
The driver team uses annotations to document certain aspects of the code:
