diff --git a/lib/node_modules/@stdlib/array/uint64/lib/main.js b/lib/node_modules/@stdlib/array/uint64/lib/main.js
index e366fe395f55..1b0360300b86 100644
--- a/lib/node_modules/@stdlib/array/uint64/lib/main.js
+++ b/lib/node_modules/@stdlib/array/uint64/lib/main.js
@@ -709,6 +709,89 @@ setReadOnly( Uint64Array.prototype, 'entries', function entries() {
 	}
 });
 
+/**
+* Returns a modified typed array filled with a fill value.
+*
+* @name fill
+* @memberof Uint64Array.prototype
+* @type {Function}
+* @param {Uint64|bigint|number} value - fill value
+* @param {integer} [start=0] - starting index (inclusive)
+* @param {integer} [end] - ending index (exclusive)
+* @throws {TypeError} `this` must be a 64-bit unsigned integer array
+* @throws {TypeError} first argument must be either a 64-bit unsigned integer or a value which can be converted to a 64-bit unsigned integer
+* @throws {TypeError} second argument must be an integer
+* @throws {TypeError} third argument must be an integer
+* @returns {Uint64Array} modified array
+*
+* @example
+* var arr = new Uint64Array( 3 );
+*
+* arr.fill( 1, 1 );
+*
+* var z = arr.get( 1 );
+* // returns <Uint64>[ 1n ]
+*
+* z = arr.get( 2 );
+* // returns <Uint64>[ 1n ]
+*/
+setReadOnly( Uint64Array.prototype, 'fill', function fill( value, start, end ) {
+	var words;
+	var buf;
+	var len;
+	var idx;
+	var val;
+	var i;
+	if ( !isUint64Array( this ) ) {
+		throw new TypeError( 'invalid invocation. `this` is not a 64-bit unsigned integer array.' );
+	}
+	try {
+		val = new Uint64( value );
+	} catch ( err ) { // eslint-disable-line no-unused-vars
+		throw new TypeError( format( 'invalid argument. First argument must be either a 64-bit unsigned integer or a value which can be converted to a 64-bit unsigned integer. Value: `%s`.', value ) );
+	}
+	buf = this._buffer;
+	len = this._length;
+	if ( arguments.length > 1 ) {
+		if ( !isInteger( start ) ) {
+			throw new TypeError( format( 'invalid argument. Second argument must be an integer. Value: `%s`.', start ) );
+		}
+		if ( start < 0 ) {
+			start += len;
+			if ( start < 0 ) {
+				start = 0;
+			}
+		}
+		if ( arguments.length > 2 ) {
+			if ( !isInteger( end ) ) {
+				throw new TypeError( format( 'invalid argument. Third argument must be an integer. Value: `%s`.', end ) );
+			}
+			if ( end < 0 ) {
+				end += len;
+				if ( end < 0 ) {
+					end = 0;
+				}
+			}
+			if ( end > len ) {
+				end = len;
+			}
+		} else {
+			end = len;
+		}
+	} else {
+		start = 0;
+		end = len;
+	}
+	words = [ 0, 0 ];
+	toWords( val, words, 1, 0 );
+	for ( i = start; i < end; i++ ) {
+		idx = 2*i;
+		buf[ idx+indices.HIGH ] = words[ 0 ];
+		buf[ idx+indices.LOW ] = words[ 1 ];
+	}
+	return this;
+});
+
 /**
 * Returns an array element.
 *