diff --git a/ui/address/contract/methodForm/useFormatFieldValue.tsx b/ui/address/contract/methodForm/useFormatFieldValue.tsx
index aec859f5f6..c658694b5f 100644
--- a/ui/address/contract/methodForm/useFormatFieldValue.tsx
+++ b/ui/address/contract/methodForm/useFormatFieldValue.tsx
@@ -18,7 +18,7 @@ export default function useFormatFieldValue({ argType, argTypeMatchInt }: Params
 
     if (argTypeMatchInt) {
       const formattedString = value.replace(/\s/g, '');
-      return parseInt(formattedString);
+      return formattedString;
     }
 
     if (argType === 'bool') {
@@ -26,11 +26,11 @@ export default function useFormatFieldValue({ argType, argTypeMatchInt }: Params
 
       switch (formattedValue) {
         case 'true': {
-          return true;
+          return 'true';
         }
 
         case 'false':{
-          return false;
+          return 'false';
         }
 
         default:
diff --git a/ui/address/contract/methodForm/useValidateField.tsx b/ui/address/contract/methodForm/useValidateField.tsx
index e0766efcc2..d14174d789 100644
--- a/ui/address/contract/methodForm/useValidateField.tsx
+++ b/ui/address/contract/methodForm/useValidateField.tsx
@@ -18,15 +18,13 @@ export default function useValidateField({ isOptional, argType, argTypeMatchInt
     return argType.match(BYTES_REGEXP);
   }, [ argType ]);
 
-  // some values are formatted before they are sent to the validator
-  // see ./useFormatFieldValue.tsx hook
-  return React.useCallback((value: string | number | boolean | undefined) => {
+  return React.useCallback((value: string | undefined) => {
     if (value === undefined || value === '') {
       return isOptional ? true : 'Field is required';
     }
 
     if (argType === 'address') {
-      if (typeof value !== 'string' || !isAddress(value)) {
+      if (!isAddress(value)) {
         return 'Invalid address format';
       }
 
@@ -41,11 +39,13 @@ export default function useValidateField({ isOptional, argType, argTypeMatchInt
     }
 
     if (argTypeMatchInt) {
-      if (typeof value !== 'number' || Object.is(value, NaN)) {
+      const formattedValue = Number(value);
+
+      if (Object.is(formattedValue, NaN)) {
         return 'Invalid integer format';
       }
 
-      if (value > argTypeMatchInt.max || value < argTypeMatchInt.min) {
+      if (formattedValue > argTypeMatchInt.max || formattedValue < argTypeMatchInt.min) {
         const lowerBoundary = argTypeMatchInt.isUnsigned ? '0' : `-1 * 2 ^ ${ Number(argTypeMatchInt.power) - 1 }`;
         const upperBoundary = argTypeMatchInt.isUnsigned ? `2 ^ ${ argTypeMatchInt.power } - 1` : `2 ^ ${ Number(argTypeMatchInt.power) - 1 } - 1`;
         return `Value should be in range from "${ lowerBoundary }" to "${ upperBoundary }" inclusively`;
@@ -55,7 +55,7 @@ export default function useValidateField({ isOptional, argType, argTypeMatchInt
     }
 
     if (argType === 'bool') {
-      if (typeof value !== 'boolean') {
+      if (value !== 'true' && value !== 'false') {
         return 'Invalid boolean format. Allowed values: true, false';
       }
     }