diff --git a/core/shared/src/main/scala/scribe/format/FormatBlock.scala b/core/shared/src/main/scala/scribe/format/FormatBlock.scala
index e7c1087bd..8b64566b2 100644
--- a/core/shared/src/main/scala/scribe/format/FormatBlock.scala
+++ b/core/shared/src/main/scala/scribe/format/FormatBlock.scala
@@ -71,7 +71,7 @@ object FormatBlock {
 
       override protected def formatCached(record: LogRecord): LogOutput = {
         val l = record.timeStamp
-        val d = s"${l.t.Y}-${l.t.m}-${l.t.d}T${l.t.T}Z"
+        val d = s"${l.t.Y}-${l.t.m}-${l.t.d}T${l.t.T}${l.t.Z}"
         new TextOutput(d)
       }
     }