diff --git a/examples/nodejs/src/experimental-features/applicable-inputs.ts b/examples/nodejs/src/experimental-features/applicable-inputs.ts
index 92def106..b188d9a1 100644
--- a/examples/nodejs/src/experimental-features/applicable-inputs.ts
+++ b/examples/nodejs/src/experimental-features/applicable-inputs.ts
@@ -40,6 +40,7 @@ import {
 import { AddressBech32, ContractId, PolicyId } from "@marlowe.io/runtime-core";
 import { RestClient } from "@marlowe.io/runtime-rest-client";
 import { WalletAPI } from "@marlowe.io/wallet";
+import * as Big from "@marlowe.io/adapter/bigint";
 import { Monoid } from "fp-ts/lib/Monoid.js";
 import * as R from "fp-ts/lib/Record.js";
 type ActionApplicant = Party | "anybody";
@@ -318,8 +319,6 @@ const accumulatorFromNotify = (action: CanNotify) => {
   };
 };
 // TODO: Move to adapter
-const minBigint = (a: bigint, b: bigint): bigint => (a < b ? a : b);
-const maxBigint = (a: bigint, b: bigint): bigint => (a > b ? a : b);
 
 function mergeBounds(bounds: Bound[]): Bound[] {
   const mergedBounds: Bound[] = [];
@@ -333,7 +332,7 @@ function mergeBounds(bounds: Bound[]): Bound[] {
       currentBound = {...bound};
     } else {
       if (bound.from <= currentBound.to) {
-        currentBound.to = maxBigint(currentBound.to, bound.to);
+        currentBound.to = Big.max(currentBound.to, bound.to);
       } else {
         mergedBounds.push(currentBound);
         currentBound = {...bound};
diff --git a/jsdelivr-npm-importmap.js b/jsdelivr-npm-importmap.js
index 54b79e36..3ad1d631 100644
--- a/jsdelivr-npm-importmap.js
+++ b/jsdelivr-npm-importmap.js
@@ -4,6 +4,8 @@ const importMap = {
       "https://cdn.jsdelivr.net/npm/@marlowe.io/adapter@0.3.0-beta-rc1/dist/bundled/esm/adapter.js",
     "@marlowe.io/adapter/assoc-map":
       "https://cdn.jsdelivr.net/npm/@marlowe.io/adapter@0.3.0-beta-rc1/dist/bundled/esm/assoc-map.js",
+    "@marlowe.io/adapter/bigint":
+      "https://cdn.jsdelivr.net/npm/@marlowe.io/adapter@0.3.0-beta-rc1/dist/bundled/esm/bigint.js",
     "@marlowe.io/adapter/codec":
       "https://cdn.jsdelivr.net/npm/@marlowe.io/adapter@0.3.0-beta-rc1/dist/bundled/esm/codec.js",
     "@marlowe.io/adapter/deep-equal":
diff --git a/packages/adapter/package.json b/packages/adapter/package.json
index 95acf1c3..f6eeba52 100644
--- a/packages/adapter/package.json
+++ b/packages/adapter/package.json
@@ -66,7 +66,13 @@
       "import": "./dist/esm/deep-equal.js",
       "require": "./dist/bundled/cjs/deep-equal.cjs",
       "types": "./dist/esm/deep-equal.d.ts"
+    },
+    "./bigint": {
+      "import": "./dist/esm/bigint.js",
+      "require": "./dist/bundled/cjs/bigint.cjs",
+      "types": "./dist/esm/bigint.d.ts"
     }
+
   },
   "dependencies": {
     "date-fns": "2.29.3",
diff --git a/packages/adapter/src/bigint.ts b/packages/adapter/src/bigint.ts
new file mode 100644
index 00000000..691c2118
--- /dev/null
+++ b/packages/adapter/src/bigint.ts
@@ -0,0 +1,6 @@
+/**
+ * Utility functions for bigint.
+ */
+
+export const min = (a: bigint, b: bigint): bigint => (a < b ? a : b);
+export const max = (a: bigint, b: bigint): bigint => (a > b ? a : b);
diff --git a/packages/language/core/v1/src/semantics.ts b/packages/language/core/v1/src/semantics.ts
index ee794299..f9b3c9c3 100644
--- a/packages/language/core/v1/src/semantics.ts
+++ b/packages/language/core/v1/src/semantics.ts
@@ -87,6 +87,7 @@ import {
 } from "./value-and-observation.js";
 import * as G from "./guards.js";
 import { POSIXTime } from "@marlowe.io/adapter/time";
+import * as Big from "@marlowe.io/adapter/bigint";
 
 export {
   Payment,
@@ -383,10 +384,6 @@ function giveMoney(
   ];
 }
 
-// TODO: Move to adapter
-const minBigint = (a: bigint, b: bigint): bigint => (a < b ? a : b);
-const maxBigint = (a: bigint, b: bigint): bigint => (a > b ? a : b);
-
 /**
  * @hidden
  */
@@ -433,7 +430,7 @@ function reduceContractStep(
         });
       }
       const balance = moneyInAccount(from_account, token, state.accounts);
-      const paidAmount = minBigint(amountToPay, balance);
+      const paidAmount = Big.min(amountToPay, balance);
       const newBalance = balance - paidAmount;
       const newAccs = updateMoneyInAccount(
         from_account,
@@ -929,7 +926,7 @@ function fixInterval(
     return invalidInterval(interval.from, interval.to);
   if (interval.to < state.minTime)
     return intervalInPastError(interval.from, interval.to, state.minTime);
-  const newFrom = maxBigint(interval.from, state.minTime);
+  const newFrom = Big.max(interval.from, state.minTime);
   const environment = { timeInterval: { from: newFrom, to: interval.to } };
   return intervalTrimmed({
     environment,