diff --git a/lib/main.js b/lib/main.js
index d091a7b..2676a5e 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -21,7 +21,7 @@
 // MODULES //
 
 var isString = require( '@stdlib/assert-is-string' ).isPrimitive;
-var format = require( '@stdlib/string-format' );
+var format = require( '@stdlib/error-tools-fmtprodmsg' );
 
 
 // MAIN //
@@ -39,7 +39,7 @@ var format = require( '@stdlib/string-format' );
 */
 function uppercase( str ) {
 	if ( !isString( str ) ) {
-		throw new TypeError( format( 'invalid argument. Must provide a string. Value: `%s`.', str ) );
+		throw new TypeError( format( '1Pv3B', str ) );
 	}
 	return str.toUpperCase();
 }
diff --git a/package.json b/package.json
index fdca742..4570592 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "@stdlib/fs-read-file": "^0.2.2",
     "@stdlib/process-read-stdin": "^0.2.2",
     "@stdlib/streams-node-stdin": "^0.2.2",
-    "@stdlib/string-format": "^0.2.2",
+    "@stdlib/error-tools-fmtprodmsg": "^0.2.2",
     "@stdlib/error-tools-fmtprodmsg": "^0.2.2"
   },
   "devDependencies": {