diff --git a/packages/web3-core-helpers/src/formatters.js b/packages/web3-core-helpers/src/formatters.js
index 0da89dd2132..e82b7a37c78 100644
--- a/packages/web3-core-helpers/src/formatters.js
+++ b/packages/web3-core-helpers/src/formatters.js
@@ -279,6 +279,13 @@ var inputLogFormatter = function(options) {
             return utils.fromUtf8(value);
     };
 
+    if (options.fromBlock)
+        options.fromBlock = inputBlockNumberFormatter(options.fromBlock);
+
+    if (options.toBlock)
+        options.toBlock = inputBlockNumberFormatter(options.toBlock);
+
+
     // make sure topics, get converted to hex
     options.topics = options.topics || [];
     options.topics = options.topics.map(function(topic){