diff --git a/equihashverify.cc b/equihashverify.cc
index cd99fc4..a0c77ed 100644
--- a/equihashverify.cc
+++ b/equihashverify.cc
@@ -9,7 +9,7 @@
 #include <vector>
 using namespace v8;
 
-int verifyEH(const char *hdr, const std::vector<unsigned char> &soln, unsigned int n, unsigned int k){
+int verifyEH(const char *hdr, const std::vector<unsigned char> &soln, unsigned int n = 200, unsigned int k = 9){
   // Hash state
   crypto_generichash_blake2b_state state;
   EhInitialiseState(n, k, state);
@@ -40,6 +40,9 @@ void Verify(const v8::FunctionCallbackInfo<Value>& args) {
   Isolate* isolate = Isolate::GetCurrent();
   HandleScope scope(isolate);
 
+  unsigned int n = 200;
+  unsigned int k = 9;
+
   if (args.Length() < 2) {
   isolate->ThrowException(Exception::TypeError(
     String::NewFromUtf8(isolate, "Wrong number of arguments")));
@@ -48,8 +51,11 @@ void Verify(const v8::FunctionCallbackInfo<Value>& args) {
 
   Local<Object> header = args[0]->ToObject();
   Local<Object> solution = args[1]->ToObject();
-  unsigned int n = args[2]->Uint32Value();
-  unsigned int k = args[3]->Uint32Value();
+
+  if (args.Length() == 4) {
+    n = args[2]->Uint32Value();
+    k = args[3]->Uint32Value();
+  }
 
   if(!node::Buffer::HasInstance(header) || !node::Buffer::HasInstance(solution)) {
   isolate->ThrowException(Exception::TypeError(