diff --git a/src/logger.ts b/src/logger.ts
index cff799f3..aa384882 100644
--- a/src/logger.ts
+++ b/src/logger.ts
@@ -66,7 +66,7 @@ const INDENT = SPACE.repeat(23)
 logger.formatArgs = function formatArgs(args) {
   const severity = args[args.length - 1]
   const name = this.namespace
-  const dateTime = showDateTime ? new Date().toISOString() : ''
+  const dateTime = showDateTime ? new Date().toISOString() + SPACE : ''
   const colorFn = SEVERITY_COLORS[severity] || identity
   const prefix = colorFn(SPACE + SEVERITY_STRINGS[severity] + SPACE)
   args[0] =