diff --git a/lib/main.js b/lib/main.js
index 418a6eb..8bcf1fd 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -21,7 +21,7 @@
 // MODULES //
 
 var isFunction = require( '@stdlib/assert-is-function' );
-var format = require( '@stdlib/string-format' );
+var format = require( '@stdlib/error-tools-fmtprodmsg' );
 
 
 // MAIN //
@@ -74,13 +74,13 @@ function funseqAsync() {
 	var i;
 	nFuncs = arguments.length;
 	if ( nFuncs < 2 ) {
-		throw new Error( 'insufficient arguments. Must provide multiple functions to execute sequentially.' );
+		throw new Error( format('1RB1Z') );
 	}
 	f = [];
 	for ( i = 0; i < nFuncs; i++ ) {
 		f.push( arguments[ i ] );
 		if ( !isFunction( f[ i ] ) ) {
-			throw new TypeError( format( 'invalid argument. All arguments must be functions. Value: `%s`.', f[ i ] ) );
+			throw new TypeError( format( '1RBAj', f[ i ] ) );
 		}
 	}
 	return pipeline;
diff --git a/package.json b/package.json
index 6215310..d209509 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   },
   "dependencies": {
     "@stdlib/assert-is-function": "^0.2.3",
-    "@stdlib/string-format": "^0.2.3",
+    "@stdlib/error-tools-fmtprodmsg": "^0.2.3",
     "@stdlib/error-tools-fmtprodmsg": "^0.2.3"
   },
   "devDependencies": {