diff --git a/core/itch_client.gd b/core/itch_client.gd
index eb5f1de..38c2397 100644
--- a/core/itch_client.gd
+++ b/core/itch_client.gd
@@ -323,7 +323,12 @@ func _rpc_call(method: String, params: Dictionary = {}) -> Dictionary:
 	var id := _next_id
 	_next_id += 1
 	var req := {"jsonrpc": "2.0", "id": id, "method": method, "params": params}
-	_send_line(JSON.stringify(req))
+	# Params can carry game dicts that went through a JSON cache roundtrip
+	# (Godot's JSON.parse_string decodes every number as a float), so an id
+	# like 936521 comes back as 936521.0 and butlerd's int64 fields reject it
+	# with RPC error -32700. Normalizing before serializing guarantees every
+	# integral number is sent as an int, mirroring the inbound normalization.
+	_send_line(JSON.stringify(_normalize_json(req)))
 
 	var out: Array = [-1, null, null]
 	while out[0] != id:
diff --git a/plugin.json b/plugin.json
index 293ce98..40ae027 100644
--- a/plugin.json
+++ b/plugin.json
@@ -1,7 +1,7 @@
 {
   "plugin.id": "itch",
   "plugin.name": "itch.io",
-  "plugin.version": "0.1.6",
+  "plugin.version": "0.1.7",
   "plugin.min-api-version": "1.1.0",
   "plugin.link": "https://github.com/YOUR_USERNAME/OpenGamepadUI-itch",
   "plugin.source": "https://github.com/YOUR_USERNAME/OpenGamepadUI-itch",