diff --git a/src/Chart.lock b/src/Chart.lock
index 1359c83..24f9323 100644
--- a/src/Chart.lock
+++ b/src/Chart.lock
@@ -16,12 +16,12 @@ dependencies:
   version: 0.2.0
 - name: grafana
   repository: https://grafana.github.io/helm-charts
-  version: 6.11.0
+  version: 6.61.2
 - name: influxdb
   repository: https://helm.influxdata.com/
   version: 4.12.5
 - name: telegraf
   repository: https://helm.influxdata.com/
   version: 1.8.48
-digest: sha256:79ca60bd2fe8c951a5037708fe69cc9ee39f8b5b4ae5b3eef3364e82bbb98970
-generated: "2024-05-27T10:27:46.47971203+02:00"
+digest: sha256:5f8eebfac4b0b6ba3ba21b5fdb35db6f44cb77de2d8d52a4cdea1c2ca6ef3f1d
+generated: "2024-06-11T09:39:59.906511155+02:00"
diff --git a/src/Chart.yaml b/src/Chart.yaml
index 1ecbbbd..594dc03 100644
--- a/src/Chart.yaml
+++ b/src/Chart.yaml
@@ -1,7 +1,7 @@
 apiVersion: v2
 name: nussknacker
 # In the main branch it should be always the -SNAPSHOT version. Release versions should be on the tags only
-version: 1.16.0-SNAPSHOT
+version: 1.15.0-preview-SNAPSHOT
 description: Nussknacker - a design, development, and deployment tool for stream processing
 home: https://nussknacker.io/
 icon: https://nussknacker.io/wp-content/uploads/2021/10/Nussknacker-short-black.svg
@@ -15,7 +15,7 @@ type: application
 # latest-staging version is used when someone run the snapshot build of this chart manually. scala_2.12 is because it can be used with Flink
 # During release it is replaced by the released image version. In the main we should always keep this version
 # TODO The best would be to publish X.Y.Z-latest docker image version in core and use it here to make it more explicit
-appVersion: 1.16.0-SNAPSHOT
+appVersion: 1.15.0-preview
 dependencies:
   - name: postgresql
     version: ~12.1.15
@@ -38,8 +38,8 @@ dependencies:
     repository: "@riskfocus"
     condition: flink.enabled
   - name: grafana
-    # Grafana has changed its license after v7.5 - 6.11.0 is its helm version
-    version: 6.11.0
+    # Grafana has changed its license after v7.5 - 6.11.0 is it's helm version
+    version: ^6.51.1
     repository: "@grafana"
     condition: grafana.enabled
   - name: influxdb
diff --git a/src/values.yaml b/src/values.yaml
index fae630e..7d15e23 100644
--- a/src/values.yaml
+++ b/src/values.yaml
@@ -221,6 +221,8 @@ flink:
 
 grafana:
   enabled: true
+  image:
+    tag: 7.5.15
   grafana.ini:
     server:
       root_url: "%(protocol)s://%(domain)s/grafana"