diff --git a/config.json b/config.json
index 8d9fcfc..210a297 100644
--- a/config.json
+++ b/config.json
@@ -32,11 +32,7 @@
       ".meta/exemplar.arr"
     ]
   },
-  "approaches": {
-    "snippet_extension": "arr"
-  },
   "exercises": {
-    "concept": [],
     "practice": [
       {
         "slug": "acronym",
@@ -587,14 +583,14 @@
     }
   ],
   "tags": [
-      "execution_mode/compiled",
-      "paradigm/functional",
-      "typing/dynamic",
-      "platform/web",
-      "platform/mac",
-      "platform/linux",
-      "runtime/language_specific",
-      "used_for/scientific_calculations",
-      "used_for/scripts"
+    "execution_mode/compiled",
+    "paradigm/functional",
+    "platform/linux",
+    "platform/mac",
+    "platform/web",
+    "runtime/language_specific",
+    "typing/dynamic",
+    "used_for/scientific_calculations",
+    "used_for/scripts"
   ]
 }
diff --git a/exercises/practice/binary-search/.meta/config.json b/exercises/practice/binary-search/.meta/config.json
index 3345e80..e58a2df 100644
--- a/exercises/practice/binary-search/.meta/config.json
+++ b/exercises/practice/binary-search/.meta/config.json
@@ -1,5 +1,7 @@
 {
-  "authors": ["meatball133"],
+  "authors": [
+    "meatball133"
+  ],
   "files": {
     "solution": [
       "binary-search.arr"
diff --git a/exercises/practice/etl/.meta/config.json b/exercises/practice/etl/.meta/config.json
index 0529f62..eeb3264 100644
--- a/exercises/practice/etl/.meta/config.json
+++ b/exercises/practice/etl/.meta/config.json
@@ -1,5 +1,7 @@
 {
-  "authors": ["meatball133"],
+  "authors": [
+    "meatball133"
+  ],
   "files": {
     "solution": [
       "etl.arr"
diff --git a/exercises/practice/two-fer/.approaches/config.json b/exercises/practice/two-fer/.approaches/config.json
index 1b0f015..8fdeedd 100644
--- a/exercises/practice/two-fer/.approaches/config.json
+++ b/exercises/practice/two-fer/.approaches/config.json
@@ -1,7 +1,7 @@
 {
   "introduction": {
-    "authors": ["BNAndras"],
-    "contributors": []
-  },
-  "approaches": []
+    "authors": [
+      "BNAndras"
+    ]
+  }
 }