diff --git a/fbchat/_client.py b/fbchat/_client.py
index 26afd49..eb4358f 100644
--- a/fbchat/_client.py
+++ b/fbchat/_client.py
@@ -1,6 +1,5 @@
 import datetime
 import time
-import json
 import requests
 
 from ._core import log
@@ -1126,7 +1125,7 @@ class Client:
                 score = int(score)
             leaderboard = delta["untypedData"].get("leaderboard")
             if leaderboard is not None:
-                leaderboard = json.loads(leaderboard)["scores"]
+                leaderboard = _util.parse_json(leaderboard)["scores"]
             self.on_game_played(
                 mid=mid,
                 author_id=author_id,
@@ -1185,7 +1184,7 @@ class Client:
         # Group poll event
         elif delta_type == "group_poll":
             event_type = delta["untypedData"]["event_type"]
-            poll_json = json.loads(delta["untypedData"]["question_json"])
+            poll_json = _util.parse_json(delta["untypedData"]["question_json"])
             poll = Poll._from_graphql(poll_json)
             if event_type == "question_creation":
                 # User created group poll
@@ -1200,13 +1199,13 @@ class Client:
                 )
             elif event_type == "update_vote":
                 # User voted on group poll
-                added_options = json.loads(delta["untypedData"]["added_option_ids"])
-                removed_options = json.loads(delta["untypedData"]["removed_option_ids"])
+                added = _util.parse_json(delta["untypedData"]["added_option_ids"])
+                removed = _util.parse_json(delta["untypedData"]["removed_option_ids"])
                 self.on_poll_voted(
                     mid=mid,
                     poll=poll,
-                    added_options=added_options,
-                    removed_options=removed_options,
+                    added_options=added,
+                    removed_options=removed,
                     author_id=author_id,
                     thread=get_thread(metadata),
                     at=at,
@@ -1277,7 +1276,7 @@ class Client:
 
         # Client payload (that weird numbers)
         elif delta_class == "ClientPayload":
-            payload = json.loads("".join(chr(z) for z in delta["payload"]))
+            payload = _util.parse_json("".join(chr(z) for z in delta["payload"]))
             at = _util.millis_to_datetime(m.get("ofd_ts"))
             for d in payload.get("deltas", []):
 
diff --git a/fbchat/_graphql.py b/fbchat/_graphql.py
index 1d4f220..54e35a4 100644
--- a/fbchat/_graphql.py
+++ b/fbchat/_graphql.py
@@ -31,7 +31,7 @@ def queries_to_json(*queries):
     rtn = {}
     for i, query in enumerate(queries):
         rtn["q{}".format(i)] = query
-    return json.dumps(rtn)
+    return _util.json_minimal(rtn)
 
 
 def response_to_json(content):
diff --git a/fbchat/_message.py b/fbchat/_message.py
index 70db0ee..f7e273d 100644
--- a/fbchat/_message.py
+++ b/fbchat/_message.py
@@ -1,5 +1,4 @@
 import attr
-import json
 from string import Formatter
 from ._core import log, attrs_default, Enum
 from . import _util, _session, _attachment, _location, _file, _quick_reply, _sticker
@@ -107,7 +106,10 @@ class Message:
             "message_id": self.id,
             "reaction": reaction.value if reaction else None,
         }
-        data = {"doc_id": 1491398900900362, "variables": json.dumps({"data": data})}
+        data = {
+            "doc_id": 1491398900900362,
+            "variables": _util.json_minimal({"data": data}),
+        }
         j = self.session._payload_post("/webgraphql/mutation", data)
         _util.handle_graphql_errors(j)
 
@@ -214,7 +216,7 @@ class MessageData(Message):
     @staticmethod
     def _parse_quick_replies(data):
         if data:
-            data = json.loads(data).get("quick_replies")
+            data = _util.parse_json(data).get("quick_replies")
             if isinstance(data, list):
                 return [_quick_reply.graphql_to_quick_reply(q) for q in data]
             elif isinstance(data, dict):
@@ -285,7 +287,7 @@ class MessageData(Message):
         unsent = False
         sticker = None
         for attachment in data.get("attachments") or ():
-            attachment = json.loads(attachment["mercuryJSON"])
+            attachment = _util.parse_json(attachment["mercuryJSON"])
             if attachment.get("blob_attachment"):
                 attachments.append(
                     _file.graphql_to_attachment(attachment["blob_attachment"])
diff --git a/fbchat/_plan.py b/fbchat/_plan.py
index 2b71a89..9eff6ac 100644
--- a/fbchat/_plan.py
+++ b/fbchat/_plan.py
@@ -1,6 +1,5 @@
 import attr
 import datetime
-import json
 from ._core import attrs_default, Enum
 from . import _exception, _util, _session
 
@@ -158,7 +157,7 @@ class PlanData(Plan):
             author_id=data.get("event_creator_id"),
             guests={
                 x["node"]["id"]: GuestStatus[x["guest_list_state"]]
-                for x in json.loads(data["guest_state_list"])
+                for x in _util.parse_json(data["guest_state_list"])
             },
         )
 
diff --git a/fbchat/_thread.py b/fbchat/_thread.py
index f6ec45f..34475db 100644
--- a/fbchat/_thread.py
+++ b/fbchat/_thread.py
@@ -216,7 +216,7 @@ class ThreadABC(metaclass=abc.ABCMeta):
     #     xmd["quick_replies"].append(q)
     # if len(quick_replies) == 1 and quick_replies[0].is_response:
     #     xmd["quick_replies"] = xmd["quick_replies"][0]
-    # data["platform_xmd"] = json.dumps(xmd)
+    # data["platform_xmd"] = _util.json_minimal(xmd)
 
     # TODO: This!
     # def quick_reply(self, quick_reply, payload=None):
diff --git a/fbchat/_util.py b/fbchat/_util.py
index d56bffa..6beed9e 100644
--- a/fbchat/_util.py
+++ b/fbchat/_util.py
@@ -28,6 +28,11 @@ def now():
     return int(time.time() * 1000)
 
 
+def json_minimal(data):
+    """Get JSON data in minimal form."""
+    return json.dumps(data, separators=(",", ":"))
+
+
 def strip_json_cruft(text):
     """Removes `for(;;);` (and other cruft) that preceeds JSON responses."""
     try: