diff --git a/src/main/resources/postal-codes.json b/src/main/resources/postal-codes.json
index acb07e9..26e22f3 100644
--- a/src/main/resources/postal-codes.json
+++ b/src/main/resources/postal-codes.json
@@ -1163,7 +1163,7 @@
     "Note": "",
     "Country": "Greece",
     "ISO": "GR",
-    "Format": "NNN NN",
+    "Format": "NNNNN",
     "Regex": "^\\d{5}$",
     "Example": "27750"
   },