diff --git a/app/modules/prover/index.ts b/app/modules/prover/index.ts
index 11be89c0487cca45bcf4e162249bc405ca08817e..eb8ab68efbfd83830a3f18e06eb8b98b97666086 100644
--- a/app/modules/prover/index.ts
+++ b/app/modules/prover/index.ts
@@ -76,7 +76,7 @@ export const ProverDependency = {
         const port = params[1];
         const difficulty = params[2];
         const generator = new BlockGeneratorWhichProves(server, null);
-        return generateAndSend(program, host, port, difficulty, server, () => generator.nextBlock);
+        return generateAndSend(program, host, port, difficulty, server, () => () => generator.nextBlock())
       }
     }, {
       name: 'gen-root [host] [port] [difficulty]',
@@ -90,7 +90,7 @@ export const ProverDependency = {
         let toDelete, catched = true;
         do {
           try {
-            await generateAndSend(program, host, port, difficulty, server, () => generator.nextBlock);
+            await generateAndSend(program, host, port, difficulty, server, () => () => generator.nextBlock())
             catched = false;
           } catch (e) {
             toDelete = await server.dal.idtyDAL.query('SELECT * FROM idty i WHERE 5 > (SELECT count(*) from cert c where c.`to` = i.pubkey)');
diff --git a/app/modules/prover/lib/blockGenerator.ts b/app/modules/prover/lib/blockGenerator.ts
index cb86c5c766378639c563677efd3bdee1436a6c7a..5562d1055bd6da6b1f5bdcfb923f6a2cd5920d49 100644
--- a/app/modules/prover/lib/blockGenerator.ts
+++ b/app/modules/prover/lib/blockGenerator.ts
@@ -38,7 +38,7 @@ export class BlockGenerator {
     this.logger = server.logger;
   }
 
-  nextBlock(manualValues:any, simulationValues:any = {}) {
+  nextBlock(manualValues:any = {}, simulationValues:any = {}) {
     return this.generateNextBlock(new NextBlockGenerator(this.mainContext, this.conf, this.dal, this.logger), manualValues, simulationValues)
   }