diff --git a/01.md b/01.md
index 361706a8..54f69149 100644
--- a/01.md
+++ b/01.md
@@ -12,19 +12,19 @@ This NIP defines the mandatory part of the Nostr protocol. New NIPs may add new
 
 Event is the only object type available. It is a hashed and signed payload in the following format:
 
-```json
+```jsonc
 {
-  "id": <32-byte lowercase hex-encoded sha256 of the serialized event data>,
-  "pubkey": <32-byte lowercase hex-encoded public key used to sign>,
-  "created_at": <unix timestamp in seconds>,
+  "id": <string 32-byte lowercase hex-encoded sha256 of the serialized event data>,
+  "pubkey": <string 32-byte lowercase hex-encoded public key used to sign>,
+  "created_at": <integer unix timestamp in seconds>,
   "kind": <integer between 0 and 65535>,
   "tags": [
-    [<tag1-name>, <tag1-value>, ...],
-    [<tag2-name>, <tag2-value>, ...],
+    [<string tag1-name>, <string tag1-value>, ...],
+    [<string tag2-name>, <string tag2-value>, ...],
     ...
   ],
-  "content": <arbitrary string>,
-  "sig": <64-byte lowercase hex of the signature of the id>
+  "content": <string>,
+  "sig": <string 64-byte lowercase hex of the signature of the id>
 }
 ```
 
@@ -36,14 +36,14 @@ Signatures and encodings are done according to the [Schnorr signatures standard
 
 To assemble the `.id`, hex encode the result of a `sha256` of the UTF-8 byte array of a JSON-serialized string in the following structure:
 
-```
+```js
 [
   0,
-  <pubkey, as a lowercase hex string>,
-  <created_at, as a number>,
-  <kind, as a number>,
-  <tags, as an array of arrays of non-null strings>,
-  <content, as a string>
+  <string pubkey, as a lowercase hex>,
+  <integer created_at>,
+  <integer kind>,
+  <stringarray tags, as an array of arrays of non-null strings>,
+  <string content>
 ]
 ```
 
@@ -136,16 +136,17 @@ To open and update, and close subscriptions, Clients MUST use the following form
 
 `<filterX>` is a JSON object that determines what events will be sent in that subscription, it can have the following attributes:
 
-```json
+```js
 {
-  "ids": [<id1>, <id2>, ...],
-  "authors": [<pubkey1>, <pubkey2>, ...],
-  "kinds": [<kind1>, <kind2>, ...],
-  "#<tag-name1 (single-letter a-zA-Z)>": [<tag value1>, <tag value2>, ...], 
-  "#<tag-name2 (single-letter a-zA-Z)>": [<tag value1>, <tag value2>, ...], 
-  "since": <an integer unix timestamp in seconds, events must be newer than this to pass>,
-  "until": <an integer unix timestamp in seconds, events must be older than this to pass>,
-  "limit": <maximum number of events to return, sorted by created_at desc>
+  "ids": [<string id1>, <string id2>, ...],
+  "authors": [<string pubkey1>, <string pubkey2>, ...],
+  "kinds": [<integer kind1>, <integer kind2>, ...],
+  "#<tag1-name (single-letter a-zA-Z)>": [<string tag1 value1>, <string tag1 value2>, ...], 
+  "#<tag2-name (single-letter a-zA-Z)>": [<string tag2 value1>, <string tag2 value2>, ...],
+  ...,
+  "since": <integer unix timestamp in seconds, events must be newer than this to pass>,
+  "until": <integer unix timestamp in seconds, events must be older than this to pass>,
+  "limit": <integer maximum number of events to return, sorted by created_at desc>
 }
 ```
 
@@ -212,4 +213,4 @@ Some examples:
   * `["CLOSED", "sub1", "duplicate: sub1 already opened"]`
   * `["CLOSED", "sub1", "unsupported: filter contains unknown elements"]`
   * `["CLOSED", "sub1", "error: could not connect to the database"]`
-  * `["CLOSED", "sub1", "error: shutting down idle subscription"]`
\ No newline at end of file
+  * `["CLOSED", "sub1", "error: shutting down idle subscription"]`