diff --git a/lib/main.js b/lib/main.js
index f5f193c..12c5cf3 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -24,7 +24,7 @@ var isObject = require( '@stdlib/assert-is-object' );
 var isPositiveInteger = require( '@stdlib/assert-is-positive-integer' ).isPrimitive;
 var hasOwnProp = require( '@stdlib/assert-has-own-property' );
 var isFunction = require( '@stdlib/assert-is-function' );
-var format = require( '@stdlib/string-format' );
+var format = require( '@stdlib/error-tools-fmtprodmsg' );
 
 
 // MAIN //
@@ -56,13 +56,13 @@ function someOwnBy( obj, n, predicate, thisArg ) {
 	var out;
 	var key;
 	if ( !isObject( obj ) ) {
-		throw new TypeError( format( 'invalid argument. First argument must be an object. Value: `%s`.', obj ) );
+		throw new TypeError( format( 'null3L', obj ) );
 	}
 	if ( !isPositiveInteger( n ) ) {
-		throw new TypeError( format( 'invalid argument. Second argument must be a positive integer. Value: `%s`.', n ) );
+		throw new TypeError( format( 'null45', n ) );
 	}
 	if ( !isFunction( predicate ) ) {
-		throw new TypeError( format( 'invalid argument. Third argument must be a function. Value: `%s`.', predicate ) );
+		throw new TypeError( format( 'null3N', predicate ) );
 	}
 	count = 0;
 	for ( key in obj ) {
diff --git a/package.json b/package.json
index 731f631..b13cd68 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "@stdlib/assert-is-function": "^0.2.2",
     "@stdlib/assert-is-object": "^0.2.2",
     "@stdlib/assert-is-positive-integer": "^0.2.2",
-    "@stdlib/string-format": "^0.2.2",
+    "@stdlib/error-tools-fmtprodmsg": "^0.2.2",
     "@stdlib/types": "^0.4.3",
     "@stdlib/error-tools-fmtprodmsg": "^0.2.2"
   },