diff --git a/test/Dockerfile.jammy b/test/Dockerfile.jammy
index 66d47b30f..8e4ff2b18 100644
--- a/test/Dockerfile.jammy
+++ b/test/Dockerfile.jammy
@@ -45,7 +45,7 @@ RUN install-tool docker v24.0.7
 RUN install-tool dotnet 8.0.100
 
 # renovate: datasource=flutter-version
-RUN install-tool flutter 3.16.2
+RUN install-tool flutter 3.16.3
 
 # renovate: datasource=github-releases packageName=fluxcd/flux2
 RUN install-tool flux v2.1.2
diff --git a/test/flutter/Dockerfile b/test/flutter/Dockerfile
index 88cc9ab57..047bd9486 100644
--- a/test/flutter/Dockerfile
+++ b/test/flutter/Dockerfile
@@ -89,7 +89,7 @@ FROM build as testd
 USER 1000
 
 # renovate: datasource=flutter-version
-RUN install-tool flutter 3.16.2
+RUN install-tool flutter 3.16.3
 
 RUN set -ex; \
     cd d; \
@@ -106,7 +106,7 @@ RUN chown -R 1001 .
 USER 1001
 
 # renovate: datasource=flutter-version
-RUN install-tool flutter 3.16.2
+RUN install-tool flutter 3.16.3
 
 RUN set -ex; \
     cd d; \
diff --git a/test/flutter/Dockerfile.arm64 b/test/flutter/Dockerfile.arm64
index de6283ae4..c06ac04b5 100644
--- a/test/flutter/Dockerfile.arm64
+++ b/test/flutter/Dockerfile.arm64
@@ -26,7 +26,7 @@ RUN install-tool git v2.43.0
 FROM base as test-flutter
 
 # renovate: datasource=flutter-version
-RUN install-tool flutter 3.16.2
+RUN install-tool flutter 3.16.3
 
 #--------------------------------------
 # Image: final