diff --git a/lib/jobManager.js b/lib/jobManager.js
index b9cc09a..08a1bbb 100644
--- a/lib/jobManager.js
+++ b/lib/jobManager.js
@@ -7,16 +7,16 @@ var util = require('./util.js');
 var blockTemplate = require('./blockTemplate.js');
 
 const EH_PARAMS_MAP = {
-    144_5: {
+    "144_5": {
         SOLUTION_LENGTH: 202,
         SOLUTION_SLICE: 2,
     },
-    192_7: {
+    "192_7": {
         SOLUTION_LENGTH: 806,
         // Unknown at this time.
         // SOLUTION_SLICE: 2,
     },
-    200_9: {
+    "200_9": {
         SOLUTION_LENGTH: 2694,
         SOLUTION_SLICE: 6,
     }