diff --git a/src/pos/exit_util.ts b/src/pos/exit_util.ts
index bef5973a..e334479e 100644
--- a/src/pos/exit_util.ts
+++ b/src/pos/exit_util.ts
@@ -120,7 +120,7 @@ export class ExitUtil {
     }
 
     private isCheckPointed_(data: IChainBlockInfo) {
-        // lastchild block is greater equal to transacton block number; 
+        // lastchild block is greater equal to transaction block number; 
         return new utils.BN(data.lastChildBlock).gte(
             new utils.BN(data.txBlockNumber)
         );
@@ -137,7 +137,7 @@ export class ExitUtil {
     }
 
     /**
-     * returns info about block number existance on parent chain
+     * returns info about block number existence on parent chain
      * 1. root block number, 
      * 2. start block number, 
      * 3. end block number