diff --git a/README.md b/README.md
index 596e5ed..7a4eaae 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ from ctypes import c_void_p, c_int64, c_int32, c_uint64
 @bpf
 @map
 def last() -> HashMap:
-    return HashMap(key_type=c_uint64, value_type=c_uint64, max_entries=1)
+    return HashMap(key=c_uint64, value=c_uint64, max_entries=1)
 
 @bpf
 @section("tracepoint/syscalls/sys_enter_execve")