diff --git a/src/main/starlark/core/options/opts.kotlinc.bzl b/src/main/starlark/core/options/opts.kotlinc.bzl
index 9b15fb8..c0ac2cd 100644
--- a/src/main/starlark/core/options/opts.kotlinc.bzl
+++ b/src/main/starlark/core/options/opts.kotlinc.bzl
@@ -28,6 +28,11 @@ def _map_jvm_target_to_flag(version):
         return None
     return ["-jvm-target=%s" % version]
 
+def _map_language_version_to_flag(version):
+    if not version:
+        return None
+    return ["-language-version=%s" % version, "-api-version=%s" % version]
+
 _KOPTS_ALL = {
     "warn": struct(
         args = dict(
@@ -349,6 +354,15 @@ _KOPTS_ALL = {
         value_to_flag = None,
         map_value_to_flag = _map_jvm_target_to_flag,
     ),
+    "language_version": struct(
+        args = dict(
+            default = "1.9",
+            doc = "-language-version",
+        ),
+        type = attr.string,
+        value_to_flag = None,
+        map_value_to_flag = _map_language_version_to_flag,
+    ),
 }
 
 # Filters out options that are not available in current compiler release