diff --git a/.changeset/update-default-sources.md b/.changeset/update-default-sources.md
new file mode 100644
index 0000000..e7eaa4e
--- /dev/null
+++ b/.changeset/update-default-sources.md
@@ -0,0 +1,5 @@
+---
+"helm-charts": patch
+---
+
+chore: update default sources based on new schema changes
diff --git a/charts/clickstack/values.yaml b/charts/clickstack/values.yaml
index ca868a8..34caa5c 100644
--- a/charts/clickstack/values.yaml
+++ b/charts/clickstack/values.yaml
@@ -108,7 +108,7 @@ hyperdx:
             "tableName": "otel_logs"
           },
           "kind": "log",
-          "timestampValueExpression": "TimestampTime",
+          "timestampValueExpression": "Timestamp",
           "name": "Logs",
           "displayedTimestampValueExpression": "Timestamp",
           "implicitColumnExpression": "Body",