diff --git a/courses/BotanicalGardens/oseda-config.json b/courses/BotanicalGardens/oseda-config.json
index d1a49d5..12a2b14 100644
--- a/courses/BotanicalGardens/oseda-config.json
+++ b/courses/BotanicalGardens/oseda-config.json
@@ -1,9 +1,9 @@
 {
   "title": "BotanicalGardens",
   "author": "ReeseHatfield",
-  "category": [
-    "Science"
-  ],
   "last_updated": "2025-11-26T21:41:51.195600391Z",
-  "color": "#008000"
+  "color": "#008000",
+  "tags": [
+    "Science"
+  ]
 }
\ No newline at end of file
diff --git a/courses/CategoryTheory/oseda-config.json b/courses/CategoryTheory/oseda-config.json
index d1ffa46..37d6209 100644
--- a/courses/CategoryTheory/oseda-config.json
+++ b/courses/CategoryTheory/oseda-config.json
@@ -1,10 +1,10 @@
 {
   "title": "CategoryTheory",
   "author": "ReeseHatfield",
-  "category": [
+  "last_updated": "2025-07-11T20:06:49.100163429Z",
+  "color": "#4287f5",
+  "tags": [
     "ComputerScience",
     "Mathematics"
-  ],
-  "last_updated": "2025-07-11T20:06:49.100163429Z",
-  "color" : "#4287f5"
-}
+  ]
+}
\ No newline at end of file
diff --git a/courses/Compilers/oseda-config.json b/courses/Compilers/oseda-config.json
index 12f8512..59225a9 100644
--- a/courses/Compilers/oseda-config.json
+++ b/courses/Compilers/oseda-config.json
@@ -1,10 +1,9 @@
 {
   "title": "Compilers",
   "author": "ReeseHatfield",
-  "category": [
-    "ComputerScience"
-  ],
   "last_updated": "2025-07-11T02:52:41.385842008Z",
-  "color" : "#4287f5"
-
-}
+  "color": "#4287f5",
+  "tags": [
+    "ComputerScience"
+  ]
+}
\ No newline at end of file
diff --git a/courses/German-101/oseda-config.json b/courses/German-101/oseda-config.json
index d5e19de..9a91f2f 100644
--- a/courses/German-101/oseda-config.json
+++ b/courses/German-101/oseda-config.json
@@ -1,8 +1,7 @@
 {
   "title": "German-101",
   "author": "Blake Payne",
-  "category": [],
   "last_updated": "2025-07-09T20:47:03.317223199Z",
-  "color" : "#4287f5"
-
-}
+  "color": "#4287f5",
+  "tags": []
+}
\ No newline at end of file
diff --git a/courses/ImSittingAtAWinansAndAmGoingInsane/oseda-config.json b/courses/ImSittingAtAWinansAndAmGoingInsane/oseda-config.json
index 82c8d7d..9713c37 100644
--- a/courses/ImSittingAtAWinansAndAmGoingInsane/oseda-config.json
+++ b/courses/ImSittingAtAWinansAndAmGoingInsane/oseda-config.json
@@ -1,11 +1,10 @@
 {
   "title": "ImSittingAtAWinansAndAmGoingInsane",
   "author": "ReeseHatfield",
-  "category": [
+  "last_updated": "2025-07-08T23:13:41.293932232Z",
+  "color": "#4287f5",
+  "tags": [
     "ComputerScience",
     "Engineering"
-  ],
-  "last_updated": "2025-07-08T23:13:41.293932232Z",
-  "color" : "#4287f5"
-
-}
+  ]
+}
\ No newline at end of file
diff --git a/courses/IntroToRust/oseda-config.json b/courses/IntroToRust/oseda-config.json
index 225ecd5..42ef874 100644
--- a/courses/IntroToRust/oseda-config.json
+++ b/courses/IntroToRust/oseda-config.json
@@ -1,9 +1,9 @@
 {
   "title": "IntroToRust",
   "author": "ReeseHatfield",
-  "category": [
-    "ComputerScience"
-  ],
   "last_updated": "2025-11-12T14:52:18.608425697Z",
-  "color": "#FFA500"
+  "color": "#FFA500",
+  "tags": [
+    "ComputerScience"
+  ]
 }
\ No newline at end of file
diff --git a/courses/PlasticsAndTheirUses/oseda-config.json b/courses/PlasticsAndTheirUses/oseda-config.json
index 25f3561..45741f2 100644
--- a/courses/PlasticsAndTheirUses/oseda-config.json
+++ b/courses/PlasticsAndTheirUses/oseda-config.json
@@ -1,10 +1,9 @@
 {
   "title": "PlasticsAndTheirUses",
   "author": "ReeseHatfield",
-  "category": [
-    "ComputerScience"
-  ],
   "last_updated": "2025-07-09T00:10:12.009530562Z",
-  "color" : "#4287f5"
-
-}
+  "color": "#4287f5",
+  "tags": [
+    "ComputerScience"
+  ]
+}
\ No newline at end of file
diff --git a/courses/Puzzles/oseda-config.json b/courses/Puzzles/oseda-config.json
index 37986ba..d17ae12 100644
--- a/courses/Puzzles/oseda-config.json
+++ b/courses/Puzzles/oseda-config.json
@@ -1,9 +1,9 @@
 {
   "title": "Puzzles",
   "author": "ReeseHatfield",
-  "category": [
-    "Aerospace"
-  ],
   "last_updated": "2025-11-26T21:54:33.483747297Z",
-  "color": "#000000"
+  "color": "#000000",
+  "tags": [
+    "Aerospace"
+  ]
 }
\ No newline at end of file
diff --git a/courses/RaspberryPis101/oseda-config.json b/courses/RaspberryPis101/oseda-config.json
index 91202b2..f5dc921 100644
--- a/courses/RaspberryPis101/oseda-config.json
+++ b/courses/RaspberryPis101/oseda-config.json
@@ -1,10 +1,10 @@
 {
   "title": "RaspberryPis101",
   "author": "ReeseHatfield",
-  "category": [
+  "last_updated": "2025-11-26T21:26:29.767286520Z",
+  "color": "#FF0000",
+  "tags": [
     "ComputerScience",
     "Engineering"
-  ],
-  "last_updated": "2025-11-26T21:26:29.767286520Z",
-  "color": "#FF0000"
+  ]
 }
\ No newline at end of file
diff --git a/courses/TouchingGrass/oseda-config.json b/courses/TouchingGrass/oseda-config.json
index 030d423..05a8a22 100644
--- a/courses/TouchingGrass/oseda-config.json
+++ b/courses/TouchingGrass/oseda-config.json
@@ -1,9 +1,9 @@
 {
   "title": "TouchingGrass",
   "author": "ReeseHatfield",
-  "category": [
-    "ComputerScience"
-  ],
   "last_updated": "2025-07-08T23:35:13.890968259Z",
-  "color" : "#4287f5"
-}
+  "color": "#4287f5",
+  "tags": [
+    "ComputerScience"
+  ]
+}
\ No newline at end of file
diff --git a/migrations/categories_to_tags.py b/migrations/categories_to_tags.py
new file mode 100755
index 0000000..a4dca5f
--- /dev/null
+++ b/migrations/categories_to_tags.py
@@ -0,0 +1,14 @@
+#!/bin/python3
+
+import json, glob
+from pathlib import Path
+
+# run me from top level oseda-lib dir
+for course in Path("./courses").iterdir():
+    oseda_conf_file = f"{course}/oseda-config.json"
+    
+    j = json.load(open(oseda_conf_file))
+    j['tags'] = j.pop('category')
+    json.dump(j, open(oseda_conf_file,'w'), indent=2)
+    
+