diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0485f0e8..91ed0dae5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -331,8 +331,8 @@ Ideally you shoud not have to directly access `HDNode` internals for general usa
 
 __added__
 - `ECPair.prototype.getNetwork`
-- `HDNode.prototype.getNetwork`, wraps the underyling keyPair's `getNetwork` method
-- `HDNode.prototype.getPublicKeyBuffer`, wraps the underyling keyPair's `getPublicKeyBuffer` method
+- `HDNode.prototype.getNetwork`, wraps the underlying keyPair's `getNetwork` method
+- `HDNode.prototype.getPublicKeyBuffer`, wraps the underlying keyPair's `getPublicKeyBuffer` method
 - `HDNode.prototype.sign`, wraps the underlying keyPair's `sign` method
 - `HDNode.prototype.verify`, wraps the underlying keyPair's `verify` method
 
diff --git a/src/psbt.js b/src/psbt.js
index 5477cd919..227e29304 100644
--- a/src/psbt.js
+++ b/src/psbt.js
@@ -90,7 +90,7 @@ class Psbt {
       __NON_WITNESS_UTXO_BUF_CACHE: [],
       __TX_IN_CACHE: {},
       __TX: this.data.globalMap.unsignedTx.tx,
-      // Psbt's predecesor (TransactionBuilder - now removed) behavior
+      // Psbt's predecessor (TransactionBuilder - now removed) behavior
       // was to not confirm input values  before signing.
       // Even though we highly encourage people to get
       // the full parent transaction to verify values, the ability to
@@ -1267,7 +1267,7 @@ function getHashForSig(inputIndex, input, cache, forValidate, sighashTypes) {
       console.warn(
         'Warning: Signing non-segwit inputs without the full parent transaction ' +
           'means there is a chance that a miner could feed you incorrect information ' +
-          "to trick you into paying large fees. This behavior is the same as Psbt's predecesor " +
+          "to trick you into paying large fees. This behavior is the same as Psbt's predecessor " +
           '(TransactionBuilder - now removed) when signing non-segwit scripts. You are not ' +
           'able to export this Psbt with toBuffer|toBase64|toHex since it is not ' +
           'BIP174 compliant.\n*********************\nPROCEED WITH CAUTION!\n' +
diff --git a/test/integration/transactions.spec.ts b/test/integration/transactions.spec.ts
index 264d99a2f..2754ee226 100644
--- a/test/integration/transactions.spec.ts
+++ b/test/integration/transactions.spec.ts
@@ -126,7 +126,7 @@ describe('bitcoinjs-lib (transactions with psbt)', () => {
     // (in)(5e4 + 7e4) - (out)(8e4 + 1e4) = (fee)3e4 = 30000, this is the miner fee
 
     // Let's show a new feature with PSBT.
-    // We can have multiple signers sign in parrallel and combine them.
+    // We can have multiple signers sign in parallel and combine them.
     // (this is not necessary, but a nice feature)
 
     // encode to send out to the signers
diff --git a/test/transaction.spec.ts b/test/transaction.spec.ts
index bf62acedf..991557ba3 100644
--- a/test/transaction.spec.ts
+++ b/test/transaction.spec.ts
@@ -350,7 +350,7 @@ describe('Transaction', () => {
   });
 
   describe('setWitness', () => {
-    it('only accepts a a witness stack (Array of Buffers)', () => {
+    it('only accepts a witness stack (Array of Buffers)', () => {
       assert.throws(() => {
         (new Transaction().setWitness as any)(0, 'foobar');
       }, /Expected property "1" of type \[Buffer], got String "foobar"/);
diff --git a/ts_src/psbt.ts b/ts_src/psbt.ts
index 66bf91194..a44646592 100644
--- a/ts_src/psbt.ts
+++ b/ts_src/psbt.ts
@@ -156,7 +156,7 @@ export class Psbt {
       __NON_WITNESS_UTXO_BUF_CACHE: [],
       __TX_IN_CACHE: {},
       __TX: (this.data.globalMap.unsignedTx as PsbtTransaction).tx,
-      // Psbt's predecesor (TransactionBuilder - now removed) behavior
+      // Psbt's predecessor (TransactionBuilder - now removed) behavior
       // was to not confirm input values  before signing.
       // Even though we highly encourage people to get
       // the full parent transaction to verify values, the ability to
@@ -1678,7 +1678,7 @@ function getHashForSig(
       console.warn(
         'Warning: Signing non-segwit inputs without the full parent transaction ' +
           'means there is a chance that a miner could feed you incorrect information ' +
-          "to trick you into paying large fees. This behavior is the same as Psbt's predecesor " +
+          "to trick you into paying large fees. This behavior is the same as Psbt's predecessor " +
           '(TransactionBuilder - now removed) when signing non-segwit scripts. You are not ' +
           'able to export this Psbt with toBuffer|toBase64|toHex since it is not ' +
           'BIP174 compliant.\n*********************\nPROCEED WITH CAUTION!\n' +