diff --git a/package.json b/package.json
index d3d10b4..02d0e39 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   "dependencies": {
     "@fontsource/roboto": "^4.3.0",
     "@project-serum/serum": "^0.13.34",
-    "@project-serum/swap": "^0.1.0-alpha.15",
+    "@project-serum/swap": "^0.1.0-alpha.20",
     "@solana/spl-token": "^0.1.4"
   },
   "peerDependencies": {
@@ -41,7 +41,7 @@
     "@project-serum/anchor": "^0.7.0",
     "@project-serum/serum": "^0.13.34",
     "@project-serum/sol-wallet-adapter": "^0.2.0",
-    "@project-serum/swap": "^0.1.0-alpha.15",
+    "@project-serum/swap": "^0.1.0-alpha.20",
     "@solana/spl-token": "^0.1.4",
     "@solana/spl-token-registry": "^0.2.86",
     "@solana/web3.js": "^1.10.1",
diff --git a/src/components/OpenOrdersDialog.tsx b/src/components/OpenOrdersDialog.tsx
index 6518e20..54167ea 100644
--- a/src/components/OpenOrdersDialog.tsx
+++ b/src/components/OpenOrdersDialog.tsx
@@ -25,6 +25,7 @@ import { Close } from "@material-ui/icons";
 import { useMarket, useOpenOrders, useDexContext } from "../context/Dex";
 import { useTokenMap } from "../context/TokenList";
 import { useMint, useOwnedTokenAccount } from "../context/Token";
+import { DEX_PID } from "../utils/pubkeys";
 
 const useStyles = makeStyles((theme) => ({
   table: {},
@@ -170,9 +171,15 @@ function OpenOrdersRow({
   };
 
   const closeOpenOrders = async () => {
-    // TODO.
-    //
-    // Blocked by https://github.com/project-serum/serum-dex/pull/112.
+    await swapClient.program.rpc.closeAccount({
+      accounts: {
+        openOrders: ooAccount.address,
+        authority: swapClient.program.provider.wallet.publicKey,
+        destination: swapClient.program.provider.wallet.publicKey,
+        market: marketClient!.address,
+        dexProgram: DEX_PID,
+      },
+    });
   };
 
   return (
diff --git a/src/components/Swap.tsx b/src/components/Swap.tsx
index d0f710d..21ce349 100644
--- a/src/components/Swap.tsx
+++ b/src/components/Swap.tsx
@@ -303,8 +303,14 @@ function TokenName({ mint, style }: { mint: PublicKey; style: any }) {
 
 function SwapButton() {
   const styles = useStyles();
-  const { fromMint, toMint, fromAmount, slippage, isClosingNewAccounts } =
-    useSwapContext();
+  const {
+    fromMint,
+    toMint,
+    fromAmount,
+    slippage,
+    isClosingNewAccounts,
+    isStrict,
+  } = useSwapContext();
   const { swapClient } = useDexContext();
   const fromMintInfo = useMint(fromMint);
   const toMintInfo = useMint(toMint);
@@ -321,6 +327,7 @@ function SwapButton() {
   const fair = useSwapFair();
   const fromWallet = useOwnedTokenAccount(fromMint);
   const toWallet = useOwnedTokenAccount(toMint);
+  const quoteMint = useMint(fromMarket && fromMarket.quoteMintAddress);
 
   // Click handler.
   const sendSwapTransaction = async () => {
@@ -330,15 +337,19 @@ function SwapButton() {
     if (!fair) {
       throw new Error("Invalid fair");
     }
-    const amount = new BN(fromAmount).mul(
-      new BN(10).pow(new BN(fromMintInfo.decimals))
-    );
+    if (!quoteMint) {
+      throw new Error("Quote mint not found");
+    }
+    const amount = new BN(fromAmount * 10 ** fromMintInfo.decimals);
     const minExchangeRate = {
-      rate: new BN(10 ** toMintInfo.decimals * (1 - BASE_TAKER_FEE_BPS))
-        .divn(fair)
+      rate: new BN(
+        (10 ** toMintInfo.decimals * (1 - BASE_TAKER_FEE_BPS)) / fair
+      )
         .muln(100 - slippage)
         .divn(100),
-      decimals: fromMintInfo.decimals,
+      fromDecimals: fromMintInfo.decimals,
+      quoteDecimals: quoteMint.decimals,
+      strict: isStrict,
     };
     const fromOpenOrders = fromMarket
       ? openOrders.get(fromMarket?.address.toString())
diff --git a/src/context/Swap.tsx b/src/context/Swap.tsx
index dc429a7..c78e4bd 100644
--- a/src/context/Swap.tsx
+++ b/src/context/Swap.tsx
@@ -56,6 +56,15 @@ export type SwapContext = {
   // True if all newly created market accounts should be closed in the
   // same user flow (ideally in the same transaction).
   isClosingNewAccounts: boolean;
+
+  // True if the swap exchange rate should be a function of nothing but the
+  // from and to tokens, ignoring any quote tokens that may have been
+  // accumulated by performing the swap.
+  //
+  // Always false (for now).
+  isStrict: boolean;
+  setIsStrict: (isStrict: boolean) => void;
+
   setIsClosingNewAccounts: (b: boolean) => void;
 };
 const _SwapContext = React.createContext<null | SwapContext>(null);
@@ -66,6 +75,7 @@ export function SwapContextProvider(props: any) {
   const [fromAmount, _setFromAmount] = useState(props.fromAmount ?? 0);
   const [toAmount, _setToAmount] = useState(props.toAmount ?? 0);
   const [isClosingNewAccounts, setIsClosingNewAccounts] = useState(false);
+  const [isStrict, setIsStrict] = useState(false);
   const [slippage, setSlippage] = useState(DEFAULT_SLIPPAGE_PERCENT);
   const [fairOverride, setFairOverride] = useState<number | null>(null);
   const fair = _useSwapFair(fromMint, toMint, fairOverride);
@@ -117,6 +127,8 @@ export function SwapContextProvider(props: any) {
         fairOverride,
         setFairOverride,
         isClosingNewAccounts,
+        isStrict,
+        setIsStrict,
         setIsClosingNewAccounts,
         referral,
       }}
diff --git a/yarn.lock b/yarn.lock
index 9685b21..32aa16a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1654,10 +1654,10 @@
     bs58 "^4.0.1"
     eventemitter3 "^4.0.4"
 
-"@project-serum/swap@^0.1.0-alpha.15":
-  version "0.1.0-alpha.15"
-  resolved "https://registry.yarnpkg.com/@project-serum/swap/-/swap-0.1.0-alpha.15.tgz#3650294c579e99c60dd502ce6bdea5ac55a90f3d"
-  integrity sha512-/388h8vXzhZ5koeXjeXIJk8gErbGdDqVzhH/W09XLKl7p//eiJ7DWdFUKVPZxUaHe8XhYrWoRzbWdBOvUXmdYA==
+"@project-serum/swap@^0.1.0-alpha.20":
+  version "0.1.0-alpha.20"
+  resolved "https://registry.yarnpkg.com/@project-serum/swap/-/swap-0.1.0-alpha.20.tgz#0d5a57d2d6e507b3375cfb8965bb85fc7bdda9cf"
+  integrity sha512-Q2schT1I/gSj3k9crlefxv9qdeWSPYPtF39Ga518cKlakdXt8FZgfmAgJs7YN389GkOo5FcNBSVvVO47H4mBAg==
   dependencies:
     "@project-serum/serum" "^0.13.34"
     "@solana/spl-token" "^0.1.3"