diff --git a/package.json b/package.json
index 0455693..8831b49 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
 	"homepage": "https://github.com/cfware/tap-selenium-manager#readme",
 	"dependencies": {
 		"istanbul-lib-coverage": "^3.0.0",
-		"pngjs": "^3.4.0",
+		"pngjs": "^4.0.0",
 		"selenium-webdriver": "^4.0.0-alpha.5"
 	},
 	"devDependencies": {