diff --git a/chart/values.yaml b/chart/values.yaml
index 50864341c0dad0983e4eaacb01daed6737c6cad5..b26c10a5dfd339f46a451bf85b67ee3d31657a24 100644
--- a/chart/values.yaml
+++ b/chart/values.yaml
@@ -128,7 +128,7 @@ istio:
   git:
     repo: https://repo1.dso.mil/platform-one/big-bang/apps/core/istio-controlplane.git
     path: "./chart"
-    tag: "1.15.0-bb.1"
+    tag: "1.15.3-bb.0"
 
   # -- Tetrate Istio Distribution - Tetrate provides FIPs verified Istio and Envoy software and support,
   # validated through the FIPs Boring Crypto module. Find out more from Tetrate - https://www.tetrate.io/tetrate-istio-subscription
@@ -244,7 +244,7 @@ istiooperator:
   git:
     repo: https://repo1.dso.mil/platform-one/big-bang/apps/core/istio-operator.git
     path: "./chart"
-    tag: "1.15.0-bb.1"
+    tag: "1.15.3-bb.0"
 
   # -- Flux reconciliation overrides specifically for the Istio Operator Package
   flux: {}