diff --git a/lib/client/protocols/generic.js b/lib/client/protocols/generic.js
index fec95d141..658337949 100644
--- a/lib/client/protocols/generic.js
+++ b/lib/client/protocols/generic.js
@@ -10,7 +10,8 @@ module.exports = function (SecretShare) {
    * @return {boolean} true if o is a valid constant, false otherwise.
    */
   SecretShare.prototype.isConstant = function (o) {
-    return typeof o === 'number';
+    let BigNumber_ = require('bignumber.js');
+    return typeof o === 'number' || o instanceof BigNumber_;
   };
 
   /**
diff --git a/lib/ext/jiff-client-bignumber.js b/lib/ext/jiff-client-bignumber.js
index 9ef217ab5..37412f4b1 100644
--- a/lib/ext/jiff-client-bignumber.js
+++ b/lib/ext/jiff-client-bignumber.js
@@ -221,7 +221,7 @@
       return jiff.helpers.BigNumber(v1).eq(v2);
     };
     jiff.share_helpers['floor/'] = function (v1, v2) {
-      return v1.div(v2).floor();
+      return v1.div(v2).decimalPlaces(0, jiff.helpers.BigNumber.ROUND_FLOOR);
     };
     jiff.share_helpers['pow'] = function (v1, v2) {
       return self.jiff.helpers.BigNumber(v1).pow(v2);
@@ -233,7 +233,7 @@
       if (typeof v === 'number') {
         return Math.floor(v);
       }
-      return v.floor();
+      return v.decimalPlaces(0, jiff.helpers._BigNumber.ROUND_FLOOR);
     };
     jiff.share_helpers['ceil'] = function (v) {
       if (typeof v === 'number') {
@@ -287,7 +287,7 @@
     jiff.helpers.mod = function (x, y) {
       x = jiff.helpers.BigNumber(x);
       y = jiff.helpers.BigNumber(y);
-      if (x.isNeg()) {
+      if (x.isNegative()) {
         return x.mod(y).plus(y);
       }
       return x.mod(y);
@@ -310,7 +310,7 @@
         var x = temp[0];
         var y = temp[1];
         var d = temp[2];
-        return [y, x.minus(y.times(a.div(b).floor())), d];
+        return [y, x.minus(y.times(a.div(b).decimalPlaces(0, jiff.helpers.BigNumber.ROUND_FLOOR))), d];
       })(a, b);
     };
 
@@ -339,12 +339,12 @@
       var precision = max.toString().length;
       // eslint-disable-next-line no-undef
       var magnitude = jiff.helpers.BigNumber(10).pow(precision);
-      var multiple = magnitude.div(max).floor().times(max);
+      var multiple = magnitude.div(max).decimalPlaces(0, jiff.helpers._BigNumber.ROUND_FLOOR).times(max);
 
       var rand;
       do {
         // eslint-disable-next-line no-undef
-        rand = jiff.helpers._BigNumber.random(precision).times(magnitude).floor();
+        rand = jiff.helpers._BigNumber.random(precision).times(magnitude).decimalPlaces(0, jiff.helpers.BigNumber.ROUND_FLOOR);
       } while (rand.gte(multiple));
 
       return rand.mod(max);
@@ -378,7 +378,7 @@
     /* SHARE CHECKS */
     jiff.share = function (secret, threshold, receivers_list, senders_list, Zp, share_id) {
       secret = secret != null ? jiff.helpers.BigNumber(secret) : secret;
-      if (secret != null && (!secret.floor().eq(secret) || secret.lt(0))) {
+      if (secret != null && (!secret.decimalPlaces(0, jiff.helpers.BigNumber.ROUND_FLOOR).eq(secret) || secret.lt(0))) {
         throw new Error("secret '" + secret + "' must be a non-negative whole number");
       }
       if (secret != null && secret.gte(Zp == null ? jiff.Zp : Zp)) {
diff --git a/lib/ext/jiff-client-fixedpoint.js b/lib/ext/jiff-client-fixedpoint.js
index 318850a8c..0ce08226d 100644
--- a/lib/ext/jiff-client-fixedpoint.js
+++ b/lib/ext/jiff-client-fixedpoint.js
@@ -372,10 +372,10 @@
     // optimized if_else
     share.if_else = function (val1, val2, op_id) {
       if (share.isConstant(val1)) {
-        val1 = magnitude.times(val1).floor();
+        val1 = magnitude.times(val1).decimalPlaces(0, share.jiff.helpers.BigNumber.ROUND_FLOOR).times(max);
       }
       if (share.isConstant(val2)) {
-        val2 = magnitude.times(val2).floor();
+        val2 = magnitude.times(val2).decimalPlaces(0, share.jiff.helpers.BigNumber.ROUND_FLOOR).times(max);
       }
 
       var reduce_share = share.legacy.cdivfac(magnitude);
@@ -445,7 +445,7 @@
 
     /* HELPERS */
     base_instance.helpers.magnitude = function (m) {
-      return base_instance.helpers.BigNumber(10).pow(m).floor();
+      return base_instance.helpers.BigNumber(10).pow(m).decimalPlaces(0, base_instance.helpers.BigNumber.ROUND_FLOOR);
     };
     base_instance.helpers.fits_in_digits = function (num) {
       var magnitude = base_instance.helpers.magnitude(base_instance.decimal_digits + base_instance.integer_digits);
@@ -466,7 +466,7 @@
         throw new Error('Fixedpoint share: integer part is too big');
       }
       var magnitude = base_instance.helpers.magnitude(base_instance.decimal_digits);
-      return magnitude.times(v).floor();
+      return magnitude.times(v).decimalPlaces(0, base_instance.helpers.BigNumber.ROUND_FLOOR);
     };
     base_instance.helpers.to_fixed = function (v) {
       v = base_instance.helpers.BigNumber(v);
diff --git a/lib/ext/jiff-server-bignumber.js b/lib/ext/jiff-server-bignumber.js
index 5a254c02a..a6ad5db9d 100644
--- a/lib/ext/jiff-server-bignumber.js
+++ b/lib/ext/jiff-server-bignumber.js
@@ -7,11 +7,11 @@ BigNumber.config({ CRYPTO: true });
 function secureRandom(max) {
   var precision = max.toString().length;
   var magnitude = new BigNumber(10).pow(precision);
-  var multiple = magnitude.div(max).floor().times(max);
+  var multiple = magnitude.div(max).decimalPlaces(0, BigNumber.ROUND_FLOOR).times(max);
 
   var rand;
   do {
-    rand = BigNumber.random(precision).times(magnitude).floor();
+    rand = BigNumber.random(precision).times(magnitude).decimalPlaces(0, BigNumber.ROUND_FLOOR);
   } while (rand.gte(multiple));
 
   return rand.mod(max);
@@ -19,7 +19,7 @@ function secureRandom(max) {
 function mod(x, y) {
   x = new BigNumber(x);
   y = new BigNumber(y);
-  if (x.isNeg()) {
+  if (x.isNegative()) {
     return x.mod(y).plus(y);
   }
   return x.mod(y);
@@ -78,7 +78,7 @@ function default_preprocessing() {
     quotient: function (jiff, computation_id, receivers_list, threshold, Zp, params) {
       var constant = jiff.helpers.BigNumber(params['constant']);
       var noise = jiff.helpers.random(Zp);
-      var quotient = noise.div(constant).floor();
+      var quotient = noise.div(constant).decimalPlaces(0, BigNumber.ROUND_FLOOR);
       return { secrets: [noise, quotient] };
     },
     numbers: function (jiff, computation_id, receivers_list, threshold, Zp, params) {
diff --git a/tests/regr-tests/arithmetics.test.ts b/tests/regr-tests/arithmetics.test.ts
index d1c671ba9..4819efcae 100644
--- a/tests/regr-tests/arithmetics.test.ts
+++ b/tests/regr-tests/arithmetics.test.ts
@@ -92,7 +92,7 @@ describe('JIFF Arithmetic Operations', () => {
   });
 
   it('should correctly multiply numbers 60.05 * 60.05 = 3606.0025', async () => {
-    async function subtraction(jiffClient: any, id: number) {
+    async function multiplication(jiffClient: any, id: number) {
       return new Promise((resolve, reject) => {
         jiffClient.wait_for([1, 2], async () => {
           try {
@@ -107,12 +107,12 @@ describe('JIFF Arithmetic Operations', () => {
       });
     }
 
-    const results = await Promise.all(jiffClients.map((client, idx) => subtraction(client, idx + 1)));
+    const results = await Promise.all(jiffClients.map((client, idx) => multiplication(client, idx + 1)));
     results.map((res) => expect(res).toEqual('3606.0025'));
   });
 
   it('should correctly divide numbers 60.05 / 60.05 = 1', async () => {
-    async function subtraction(jiffClient: any, id: number) {
+    async function division(jiffClient: any, id: number) {
       return new Promise((resolve, reject) => {
         jiffClient.wait_for([1, 2], async () => {
           try {
@@ -127,7 +127,7 @@ describe('JIFF Arithmetic Operations', () => {
       });
     }
 
-    const results = await Promise.all(jiffClients.map((client, idx) => subtraction(client, idx + 1)));
+    const results = await Promise.all(jiffClients.map((client, idx) => division(client, idx + 1)));
     results.map((res) => expect(res).toEqual('1'));
   }, 35000);
 });