diff --git a/lib/connection/result/column.js b/lib/connection/result/column.js
index 9eafd3837..42671cbb8 100644
--- a/lib/connection/result/column.js
+++ b/lib/connection/result/column.js
@@ -456,10 +456,10 @@ function convertRawTimestampTz(rawColumnValue, column, context)
 
     // extract everything but the lowest 14 bits to get the fractional seconds
     valFracSecsBig =
-      valFracSecsWithTzBig.dividedBy(16384).floor();
+      valFracSecsWithTzBig.dividedBy(16384).integerValue(BigNumber.ROUND_FLOOR);
 
     // extract the lowest 14 bits to get the timezone
-    if (valFracSecsWithTzBig.greaterThanOrEqualTo(0))
+    if (valFracSecsWithTzBig.isGreaterThanOrEqualTo(0))
     {
       timezoneBig = valFracSecsWithTzBig.modulo(16384);
     }
@@ -521,7 +521,7 @@ function convertRawTimestampHelper(
   // split the value into epoch seconds + nanoseconds; for example,
   // 1365148923.123456789 will be split into 1365148923 (epoch seconds)
   // and 123456789 (nano seconds)
-  var valSecBig = epochFracSecsBig.dividedBy(scaleFactor).floor();
+  var valSecBig = epochFracSecsBig.dividedBy(scaleFactor).integerValue(BigNumber.ROUND_FLOOR);
   var fractionsBig = epochFracSecsBig.minus(valSecBig.times(scaleFactor));
   var valSecNanoBig = fractionsBig.times(Math.pow(10, 9 - scale));
 
diff --git a/lib/services/sf.js b/lib/services/sf.js
index 554ef643f..bcec47fac 100644
--- a/lib/services/sf.js
+++ b/lib/services/sf.js
@@ -485,9 +485,10 @@ function SnowflakeService(connectionConfig, httpClient, config)
     operationQueue.length = 0;
   };
 
-  this.isConnected = function ()
-  {
-    return currentState === stateConnected;
+  this.isConnected = function () {
+    return currentState === stateConnected ||
+      currentState === stateConnecting ||
+      currentState === stateRenewing;
   };
 
   this.getServiceName = function ()
diff --git a/package.json b/package.json
index 47bdc107f..4477d752e 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "asn1.js-rfc5280": "^3.0.0",
     "axios": "^1.5.1",
     "big-integer": "^1.6.43",
-    "bignumber.js": "^2.4.0",
+    "bignumber.js": "^9.1.2",
     "binascii": "0.0.2",
     "bn.js": "^5.2.1",
     "browser-request": "^0.3.3",