diff --git a/src/cjs/block.cjs b/src/cjs/block.cjs
index bc4db559c..ddc2e4a1a 100644
--- a/src/cjs/block.cjs
+++ b/src/cjs/block.cjs
@@ -62,7 +62,7 @@ class Block {
     if (buffer.length < 80) throw new Error('Buffer too small (< 80 bytes)');
     const bufferReader = new bufferutils_js_1.BufferReader(buffer);
     const block = new Block();
-    block.version = bufferReader.readInt32();
+    block.version = bufferReader.readUInt32();
     block.prevHash = bufferReader.readSlice(32);
     block.merkleRoot = bufferReader.readSlice(32);
     block.timestamp = bufferReader.readUInt32();
@@ -184,7 +184,7 @@ class Block {
   toBuffer(headersOnly) {
     const buffer = new Uint8Array(this.byteLength(headersOnly));
     const bufferWriter = new bufferutils_js_1.BufferWriter(buffer);
-    bufferWriter.writeInt32(this.version);
+    bufferWriter.writeUInt32(this.version);
     bufferWriter.writeSlice(this.prevHash);
     bufferWriter.writeSlice(this.merkleRoot);
     bufferWriter.writeUInt32(this.timestamp);
diff --git a/src/esm/block.js b/src/esm/block.js
index c717d3d7a..8c574f09f 100644
--- a/src/esm/block.js
+++ b/src/esm/block.js
@@ -20,7 +20,7 @@ export class Block {
     if (buffer.length < 80) throw new Error('Buffer too small (< 80 bytes)');
     const bufferReader = new BufferReader(buffer);
     const block = new Block();
-    block.version = bufferReader.readInt32();
+    block.version = bufferReader.readUInt32();
     block.prevHash = bufferReader.readSlice(32);
     block.merkleRoot = bufferReader.readSlice(32);
     block.timestamp = bufferReader.readUInt32();
@@ -142,7 +142,7 @@ export class Block {
   toBuffer(headersOnly) {
     const buffer = new Uint8Array(this.byteLength(headersOnly));
     const bufferWriter = new BufferWriter(buffer);
-    bufferWriter.writeInt32(this.version);
+    bufferWriter.writeUInt32(this.version);
     bufferWriter.writeSlice(this.prevHash);
     bufferWriter.writeSlice(this.merkleRoot);
     bufferWriter.writeUInt32(this.timestamp);
diff --git a/ts_src/block.ts b/ts_src/block.ts
index 5d065a19f..7895d4b09 100644
--- a/ts_src/block.ts
+++ b/ts_src/block.ts
@@ -24,7 +24,7 @@ export class Block {
     const bufferReader = new BufferReader(buffer);
 
     const block = new Block();
-    block.version = bufferReader.readInt32();
+    block.version = bufferReader.readUInt32();
     block.prevHash = bufferReader.readSlice(32);
     block.merkleRoot = bufferReader.readSlice(32);
     block.timestamp = bufferReader.readUInt32();
@@ -175,7 +175,7 @@ export class Block {
 
     const bufferWriter = new BufferWriter(buffer);
 
-    bufferWriter.writeInt32(this.version);
+    bufferWriter.writeUInt32(this.version);
     bufferWriter.writeSlice(this.prevHash!);
     bufferWriter.writeSlice(this.merkleRoot!);
     bufferWriter.writeUInt32(this.timestamp);