diff --git a/ui/app/pages/swaps/index.js b/ui/app/pages/swaps/index.js
index 02aff4a32..f41aef9d6 100644
--- a/ui/app/pages/swaps/index.js
+++ b/ui/app/pages/swaps/index.js
@@ -299,7 +299,7 @@ export default function Swap() {
                     ethBalance={ethBalance}
                     setMaxSlippage={setMaxSlippage}
                     selectedAccountAddress={selectedAccountAddress}
-                    maxSlippage={Number(maxSlippage)}
+                    maxSlippage={maxSlippage}
                   />
                 )
               }}
diff --git a/ui/app/pages/swaps/select-quote-popover/select-quote-popover-constants.js b/ui/app/pages/swaps/select-quote-popover/select-quote-popover-constants.js
index 516a7ae84..8d25a5b93 100644
--- a/ui/app/pages/swaps/select-quote-popover/select-quote-popover-constants.js
+++ b/ui/app/pages/swaps/select-quote-popover/select-quote-popover-constants.js
@@ -10,7 +10,7 @@ export const QUOTE_DATA_ROWS_PROPTYPES_SHAPE = PropTypes.shape({
   networkFees: PropTypes.string.isRequired,
   quoteSource: PropTypes.string.isRequired,
   rawNetworkFees: PropTypes.string.isRequired,
-  slippage: PropTypes.string.isRequired,
+  slippage: PropTypes.number.isRequired,
   sourceTokenDecimals: PropTypes.number.isRequired,
   sourceTokenSymbol: PropTypes.string.isRequired,
   sourceTokenValue: PropTypes.string.isRequired,
diff --git a/ui/app/pages/swaps/slippage-buttons/slippage-buttons.js b/ui/app/pages/swaps/slippage-buttons/slippage-buttons.js
index 20f706366..fe5daaa63 100644
--- a/ui/app/pages/swaps/slippage-buttons/slippage-buttons.js
+++ b/ui/app/pages/swaps/slippage-buttons/slippage-buttons.js
@@ -116,7 +116,7 @@ export default function SlippageButtons({ onSelect }) {
                     <input
                       onChange={(event) => {
                         setCustomValue(event.target.value)
-                        onSelect(event.target.value)
+                        onSelect(Number(event.target.value))
                       }}
                       type="number"
                       step="0.1"