diff --git a/compiler.go b/compiler.go
index b73e31c..801b079 100644
--- a/compiler.go
+++ b/compiler.go
@@ -153,7 +153,7 @@ func (c *Compiler) execSolc() (*rawCompilerOutput, error) {
 
 	filename := c.Filename
 
-	args := []string{filename, "--combined-json", "bin,metadata", "--evm-version", "homestead"}
+	args := []string{filename, "--combined-json", "bin,metadata"}
 
 	if !opts.NoOptimize {
 		args = append(args, "--optimize")
diff --git a/go.mod b/go.mod
index 2d3ba56..cb180b8 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,7 @@
 module github.com/qtumproject/solar
 
+go 1.15
+
 require (
 	github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc // indirect
 	github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf // indirect