diff --git a/grafana/datasource/datasource.tf b/grafana/datasource/datasource.tf
index cb953e1..a2eec52 100644
--- a/grafana/datasource/datasource.tf
+++ b/grafana/datasource/datasource.tf
@@ -20,6 +20,13 @@ resource "grafana_data_source" "this" {
   # Encodes initial, non-dependent JSON data.
   # Configurations that depend on other datasource UIDs will be handled separately.
   json_data_encoded = each.value.json_data != null ? jsonencode(each.value.json_data) : null
+
+  # ignore changes made by the _config resource
+  lifecycle {
+    ignore_changes = [
+      json_data_encoded,
+    ]
+  }
 }
 
 # Step 2: Apply Loki-specific 'derivedFields' configuration.