diff --git a/test/Dockerfile.distro b/test/Dockerfile.distro
index 7c1baaac5..3415498b9 100644
--- a/test/Dockerfile.distro
+++ b/test/Dockerfile.distro
@@ -156,7 +156,7 @@ FROM build AS test-php
 # renovate: datasource=github-releases packageName=containerbase/php-prebuild
 RUN install-tool php 8.4.1
 # renovate: datasource=github-releases packageName=containerbase/composer-prebuild
-RUN install-tool composer 2.8.3
+RUN install-tool composer 2.8.4
 
 #--------------------------------------
 # Image: test-python
diff --git a/test/php/Dockerfile b/test/php/Dockerfile
index bc60f0a55..c046285cf 100644
--- a/test/php/Dockerfile
+++ b/test/php/Dockerfile
@@ -47,7 +47,7 @@ RUN install-tool php 8.4.1
 
 
 # renovate: datasource=github-releases packageName=containerbase/composer-prebuild
-RUN install-tool composer 2.8.3
+RUN install-tool composer 2.8.4
 
 # test with latest version
 RUN install-tool composer latest
@@ -91,7 +91,7 @@ RUN install-tool php
 RUN install-tool composer
 
 # renovate: datasource=github-releases packageName=containerbase/composer-prebuild
-RUN install-tool composer 2.8.3
+RUN install-tool composer 2.8.4
 
 
 RUN set -ex; \
diff --git a/test/php/Dockerfile.arm64 b/test/php/Dockerfile.arm64
index 8157f223a..c4467fd61 100644
--- a/test/php/Dockerfile.arm64
+++ b/test/php/Dockerfile.arm64
@@ -45,7 +45,7 @@ RUN install-tool php 8.4.1
 FROM test-php AS test-composer
 
 # renovate: datasource=github-releases packageName=containerbase/composer-prebuild
-RUN install-tool composer 2.8.3
+RUN install-tool composer 2.8.4
 
 #--------------------------------------
 # Image: final