diff --git a/tsconfig.json b/tsconfig.json
index 66d8fb5..5de6809 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -18,6 +18,7 @@
 		"noFallthroughCasesInSwitch": true,
 		"allowSyntheticDefaultImports": true,
 		"strictNullChecks": true,
+		"strictFunctionTypes": true,
 		"alwaysStrict": true
 	},
 	"exclude": [