diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json
index 0c7442d1..45622ded 100644
--- a/src/core/config/Categories.json
+++ b/src/core/config/Categories.json
@@ -224,7 +224,7 @@
             "Parse User Agent",
             "Parse IP range",
             "Parse IPv6 address",
-	    "IPv6 Transition Addresses",
+            "IPv6 Transition Addresses",
             "Parse IPv4 header",
             "Parse TCP",
             "Parse UDP",