diff --git a/libweb3jsonrpc/WebThreeStubServerBase.cpp b/libweb3jsonrpc/WebThreeStubServerBase.cpp
index d4b6c9706..7ad29ed1b 100644
--- a/libweb3jsonrpc/WebThreeStubServerBase.cpp
+++ b/libweb3jsonrpc/WebThreeStubServerBase.cpp
@@ -437,10 +437,9 @@ Json::Value WebThreeStubServerBase::eth_getWork()
 	return ret;
 }
 
-int WebThreeStubServerBase::eth_submitWork(std::string const& _nonce)
+bool WebThreeStubServerBase::eth_submitWork(std::string const& _nonce)
 {
-	client()->submitNonce(jsToFixed<32>(_nonce));
-	return 0;
+	return client()->submitNonce(jsToFixed<32>(_nonce));
 }
 
 std::string WebThreeStubServerBase::shh_newGroup(std::string const& _id, std::string const& _who)
diff --git a/libweb3jsonrpc/WebThreeStubServerBase.h b/libweb3jsonrpc/WebThreeStubServerBase.h
index cf279a082..1190ce407 100644
--- a/libweb3jsonrpc/WebThreeStubServerBase.h
+++ b/libweb3jsonrpc/WebThreeStubServerBase.h
@@ -104,7 +104,7 @@ public:
 	virtual bool eth_uninstallFilter(int const& _id);
 
 	virtual Json::Value eth_getWork();
-	virtual int eth_submitWork(std::string const& _nonce);
+	virtual bool eth_submitWork(std::string const& _nonce);
 
 	virtual std::string db_get(std::string const& _name, std::string const& _key);
 	virtual std::string db_getString(std::string const& _name, std::string const& _key);
diff --git a/libweb3jsonrpc/abstractwebthreestubserver.h b/libweb3jsonrpc/abstractwebthreestubserver.h
index 9d4b4f467..dda8def08 100644
--- a/libweb3jsonrpc/abstractwebthreestubserver.h
+++ b/libweb3jsonrpc/abstractwebthreestubserver.h
@@ -50,7 +50,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
             this->bindAndAddMethod(new jsonrpc::Procedure("eth_filterLogs", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_filterLogsI);
             this->bindAndAddMethod(new jsonrpc::Procedure("eth_logs", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::eth_logsI);
             this->bindAndAddMethod(new jsonrpc::Procedure("eth_getWork", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY,  NULL), &AbstractWebThreeStubServer::eth_getWorkI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_submitWork", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_submitWorkI);
+            this->bindAndAddMethod(new jsonrpc::Procedure("eth_submitWork", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_submitWorkI);
             this->bindAndAddMethod(new jsonrpc::Procedure("db_put", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING,"param3",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_putI);
             this->bindAndAddMethod(new jsonrpc::Procedure("db_get", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_getI);
             this->bindAndAddMethod(new jsonrpc::Procedure("db_putString", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING,"param3",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_putStringI);
@@ -307,7 +307,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         virtual Json::Value eth_filterLogs(const int& param1) = 0;
         virtual Json::Value eth_logs(const Json::Value& param1) = 0;
         virtual Json::Value eth_getWork() = 0;
-        virtual int eth_submitWork(const std::string& param1) = 0;
+        virtual bool eth_submitWork(const std::string& param1) = 0;
         virtual bool db_put(const std::string& param1, const std::string& param2, const std::string& param3) = 0;
         virtual std::string db_get(const std::string& param1, const std::string& param2) = 0;
         virtual bool db_putString(const std::string& param1, const std::string& param2, const std::string& param3) = 0;
diff --git a/libweb3jsonrpc/spec.json b/libweb3jsonrpc/spec.json
index 5a19eb246..38b9f7b2a 100644
--- a/libweb3jsonrpc/spec.json
+++ b/libweb3jsonrpc/spec.json
@@ -44,7 +44,7 @@
             { "name": "eth_logs", "params": [{}], "order": [], "returns": []},
 
             { "name": "eth_getWork", "params": [], "order": [], "returns": []},
-            { "name": "eth_submitWork", "params": [""], "order": [], "returns": 0},
+            { "name": "eth_submitWork", "params": [""], "order": [], "returns": true},
 
             { "name": "db_put", "params": ["", "", ""], "order": [], "returns": true},
             { "name": "db_get", "params": ["", ""], "order": [], "returns": ""},