diff --git a/security/keymint/aidl/Android.bp b/security/keymint/aidl/Android.bp
index e346610..a2e58ac 100644
--- a/security/keymint/aidl/Android.bp
+++ b/security/keymint/aidl/Android.bp
@@ -17,7 +17,7 @@
         "android.hardware.security.secureclock-V1",
     ],
     stability: "vintf",
-    frozen: true,
+    frozen: false,
     backend: {
         java: {
             platform_apis: true,
@@ -51,34 +51,42 @@
 
 }
 
+// An aidl_interface_defaults that includes the latest KeyMint AIDL interface.
+// aidl_interface modules that depend on KeyMint directly can include this
+// aidl_interface_defaults to avoid managing dependency versions explicitly.
+aidl_interface_defaults {
+    name: "android.hardware.security.keymint-latest-defaults",
+    imports: ["android.hardware.security.keymint-V4"],
+}
+
 // cc_defaults that includes the latest KeyMint AIDL library.
 // Modules that depend on KeyMint directly can include this cc_defaults to avoid
 // managing dependency versions explicitly.
 cc_defaults {
     name: "keymint_use_latest_hal_aidl_ndk_static",
     static_libs: [
-        "android.hardware.security.keymint-V3-ndk",
+        "android.hardware.security.keymint-V4-ndk",
     ],
 }
 
 cc_defaults {
     name: "keymint_use_latest_hal_aidl_ndk_shared",
     shared_libs: [
-        "android.hardware.security.keymint-V3-ndk",
+        "android.hardware.security.keymint-V4-ndk",
     ],
 }
 
 cc_defaults {
     name: "keymint_use_latest_hal_aidl_cpp_static",
     static_libs: [
-        "android.hardware.security.keymint-V3-cpp",
+        "android.hardware.security.keymint-V4-cpp",
     ],
 }
 
 cc_defaults {
     name: "keymint_use_latest_hal_aidl_cpp_shared",
     shared_libs: [
-        "android.hardware.security.keymint-V3-cpp",
+        "android.hardware.security.keymint-V4-cpp",
     ],
 }
 
@@ -88,6 +96,6 @@
 rust_defaults {
     name: "keymint_use_latest_hal_aidl_rust",
     rustlibs: [
-        "android.hardware.security.keymint-V3-rust",
+        "android.hardware.security.keymint-V4-rust",
     ],
 }