diff --git a/PeriodicTableJSON.json b/PeriodicTableJSON.json
index 12b9714..0b3bb59 100644
--- a/PeriodicTableJSON.json
+++ b/PeriodicTableJSON.json
@@ -3332,7 +3332,7 @@
             "appearance": null, 
             "atomic_mass": 289, 
             "boil": 1400, 
-            "category": "unknown, probably post transition metal", 
+            "category": "unknown, probably post-transition metal", 
             "color": null, 
             "density": 13.5, 
             "discovered_by": "Joint Institute for Nuclear Research", 
@@ -3363,7 +3363,7 @@
             "appearance": null, 
             "atomic_mass": 293, 
             "boil": 10351135, 
-            "category": "unknown, probably post transition metal", 
+            "category": "unknown, probably post-transition metal", 
             "color": null, 
             "density": 12.9, 
             "discovered_by": "Joint Institute for Nuclear Research",