diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93151508..c3f3818e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -81,6 +81,7 @@
 - Bump github.com/Azure/azure-sdk-for-go/sdk/azidentity from 1.2.1 to 1.6.0 ([#471](https://github.com/getsentry/vroom/pull/471))
 - Remove unused flamegraph endpoint (dead code) ([#472](https://github.com/getsentry/vroom/pull/472))
 - Remove unused functions endpoint (dead code) ([#474](https://github.com/getsentry/vroom/pull/474))
+- Serialize chunk fields with lower case ([#483](https://github.com/getsentry/vroom/pull/483))
 
 ## 23.12.0
 
diff --git a/internal/chunk/chunk.go b/internal/chunk/chunk.go
index df114525..c3d95a29 100644
--- a/internal/chunk/chunk.go
+++ b/internal/chunk/chunk.go
@@ -40,13 +40,13 @@ type (
 		Received       float64 `json:"received"`
 		RetentionDays  int     `json:"retention_days"`
 
-		Measurements json.RawMessage
+		Measurements json.RawMessage `json:"measurements"`
 	}
 
 	Data struct {
-		Frames         []frame.Frame
-		Samples        []Sample
-		Stacks         [][]int
+		Frames         []frame.Frame                    `json:"frames"`
+		Samples        []Sample                         `json:"samples"`
+		Stacks         [][]int                          `json:"stacks"`
 		ThreadMetadata map[string]sample.ThreadMetadata `json:"thread_metadata"`
 	}