diff --git a/config.json b/config.json
index 0fd2b2f..e267521 100644
--- a/config.json
+++ b/config.json
@@ -19,26 +19,33 @@
     "average_run_time": 2
   },
   "files": {
-    "solution": ["%{snake_slug}.gd"],
-    "test": ["%{snake_slug}_test.gd"],
-    "example": [".meta/example.gd"],
-    "exemplar": [".meta/exemplar.gd"]
+    "solution": [
+      "%{snake_slug}.gd"
+    ],
+    "test": [
+      "%{snake_slug}_test.gd"
+    ],
+    "example": [
+      ".meta/example.gd"
+    ],
+    "exemplar": [
+      ".meta/exemplar.gd"
+    ]
   },
   "exercises": {
-    "concept": [],
     "practice": [
       {
-        "uuid": "1adfc420-46f2-4d5b-93a3-165ede1fcd9f",
         "slug": "hello-world",
         "name": "Hello World",
+        "uuid": "1adfc420-46f2-4d5b-93a3-165ede1fcd9f",
         "practices": [],
         "prerequisites": [],
         "difficulty": 1
       },
       {
-        "uuid": "e1f3aab9-ca32-4f6f-b266-d05d82c94535",
         "slug": "two-fer",
         "name": "Two Fer",
+        "uuid": "e1f3aab9-ca32-4f6f-b266-d05d82c94535",
         "practices": [],
         "prerequisites": [],
         "difficulty": 1
@@ -68,9 +75,9 @@
         "difficulty": 2
       },
       {
-        "uuid": "c3b37c54-cc4e-49a5-a869-cd7700b0e448",
         "slug": "leap",
         "name": "Leap",
+        "uuid": "c3b37c54-cc4e-49a5-a869-cd7700b0e448",
         "practices": [],
         "prerequisites": [],
         "difficulty": 1
@@ -148,9 +155,9 @@
         "difficulty": 2
       },
       {
-        "uuid": "9a52fffc-2672-41fb-b3ea-bef9c801726d",
         "slug": "atbash-cipher",
         "name": "Atbash Cipher",
+        "uuid": "9a52fffc-2672-41fb-b3ea-bef9c801726d",
         "practices": [],
         "prerequisites": [],
         "difficulty": 2
@@ -213,7 +220,6 @@
       }
     ]
   },
-  "concepts": [],
   "key_features": [
     {
       "title": "Strong, dynamic typing",
@@ -247,15 +253,15 @@
     }
   ],
   "tags": [
-    "paradigm/object_oriented",
-    "typing/gradual",
     "execution_mode/interpreted",
-    "platform/windows",
-    "platform/mac",
-    "platform/linux",
+    "paradigm/object_oriented",
     "platform/android",
     "platform/ios",
+    "platform/linux",
+    "platform/mac",
     "platform/web",
+    "platform/windows",
+    "typing/gradual",
     "used_for/games"
   ]
 }
diff --git a/exercises/practice/resistor-color-expert/.meta/config.json b/exercises/practice/resistor-color-expert/.meta/config.json
index edd1746..3b6d067 100644
--- a/exercises/practice/resistor-color-expert/.meta/config.json
+++ b/exercises/practice/resistor-color-expert/.meta/config.json
@@ -1,5 +1,7 @@
 {
-  "authors": ["glaxxie"],
+  "authors": [
+    "glaxxie"
+  ],
   "files": {
     "solution": [
       "resistor_color_expert.gd"
diff --git a/exercises/practice/two-fer/.meta/config.json b/exercises/practice/two-fer/.meta/config.json
index 1edc030..f9a81f3 100644
--- a/exercises/practice/two-fer/.meta/config.json
+++ b/exercises/practice/two-fer/.meta/config.json
@@ -1,5 +1,7 @@
 {
-  "authors": ["meatball133"],
+  "authors": [
+    "meatball133"
+  ],
   "files": {
     "solution": [
       "two_fer.gd"