diff --git a/readme.md b/readme.md
index e9aab13..a779dcc 100644
--- a/readme.md
+++ b/readme.md
@@ -75,6 +75,8 @@ native-image generation and to automate your native-image workflows.
   binary
 - [`nativeImageVersion`](#nativeimageversion): the GraalVM version to use for
   native-image
+- [`nativeImageJvm`](#nativeimagejvm): the GraalVM JVM version to use for
+  native-image
 - [`nativeImageCommand`](#nativeimagecommand): the command to launch
   `native-image`
 - [`nativeImageReady`](#nativeimageready): callback hook when native-image is
@@ -136,6 +138,17 @@ CI to generate the binary in a specific place.
 
 **Example usage**: `nativeImageVersion := "19.3.3"`
 
+### `nativeImageJvm`
+
+**Type**: `SettingKey[String]`
+
+**Description**: the GraalVM JVM version to use.
+
+**Default**: `"graalvm-java11"`. Must be one of: `"graalvm-java11"`, `"graalvm"`
+(Java 8).
+
+**Example usage**: `nativeImageVersion := "graalvm"`
+
 ### `nativeImageCommand`
 
 **Type**: `TaskKey[Seq[String]]`