diff --git a/pkg/generators/dsl.go b/pkg/generators/dsl.go
index 26fb5e8f9..d7ea79368 100644
--- a/pkg/generators/dsl.go
+++ b/pkg/generators/dsl.go
@@ -10,7 +10,7 @@ import (
 	"net/url"
 	"regexp"
 	"strings"
-
+    "log"
 	"github.com/Knetic/govaluate"
 )
 
@@ -72,11 +72,14 @@ func HelperFunctions() (functions map[string]govaluate.ExpressionFunction) {
 		return sEnc, nil
 	}
 
-	functions["base64_decode"] = func(args ...interface{}) (interface{}, error) {
-		sEnc := base64.StdEncoding.EncodeToString([]byte(args[0].(string)))
+     functions["base64_decode"] = func(args ...interface{}) (interface{}, error) {
+        sDec, err := base64.StdEncoding.DecodeString(args[0].(string))
+            if err != nil {
+            log.Fatal("error:", err)
+            }
 
-		return sEnc, nil
-	}
+        return sDec, nil
+    }
 
 	functions["url_encode"] = func(args ...interface{}) (interface{}, error) {
 		return url.PathEscape(args[0].(string)), nil