diff --git a/riscv_config/constants.py b/riscv_config/constants.py
index b2c7d9a..ba1a2b6 100644
--- a/riscv_config/constants.py
+++ b/riscv_config/constants.py
@@ -8,7 +8,7 @@
 platform_schema = os.path.join(root, 'schemas/schema_platform.yaml')
 custom_schema = os.path.join(root, 'schemas/schema_custom.yaml')
 Zvl_extensions = [
-        "Zvl32b", "Zvl64b", "Zvl128b", "Zvl256b", "Zve512b", "Zvl1024b"
+        "Zvl32b", "Zvl64b", "Zvl128b", "Zvl256b", "Zvl512b", "Zvl1024b", "Zvl2048b", "Zvl4096b"
 ]
 Zvef_extensions = [
         "Zve32f", "Zve64f"