diff --git a/Dockerfile_sample b/Dockerfile_sample
index 04aca18..b06d8d8 100644
--- a/Dockerfile_sample
+++ b/Dockerfile_sample
@@ -17,7 +17,7 @@ ENV CGO_ENABLED=0
 RUN vx build -c velox.toml -o /usr/bin/
 
 # PHP image
-FROM --platform=${TARGETPLATFORM:-linux/amd64} php:8.3-cli
+FROM --platform=${TARGETPLATFORM:-linux/amd64} php:8.4-cli
 
 # copy required files from builder image
 COPY --from=velox /usr/bin/rr /usr/bin/rr