diff --git a/test/Dockerfile.distro b/test/Dockerfile.distro
index e2d8eb5324..cc178d0557 100644
--- a/test/Dockerfile.distro
+++ b/test/Dockerfile.distro
@@ -153,7 +153,7 @@ FROM build AS test-php
 # renovate: datasource=github-releases packageName=containerbase/php-prebuild
 RUN install-tool php 8.3.13
 # renovate: datasource=github-releases packageName=containerbase/composer-prebuild
-RUN install-tool composer 2.8.2
+RUN install-tool composer 2.8.3
 
 #--------------------------------------
 # Image: test-python
diff --git a/test/php/Dockerfile b/test/php/Dockerfile
index 073f73033b..145a00a4f6 100644
--- a/test/php/Dockerfile
+++ b/test/php/Dockerfile
@@ -47,7 +47,7 @@ RUN install-tool php 8.3.13
 
 
 # renovate: datasource=github-releases packageName=containerbase/composer-prebuild
-RUN install-tool composer 2.8.2
+RUN install-tool composer 2.8.3
 
 # 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 2.8.2
+RUN install-tool composer 2.8.3
 
 
 RUN set -ex; \
diff --git a/test/php/Dockerfile.arm64 b/test/php/Dockerfile.arm64
index 45885bc1d8..02bd4a0794 100644
--- a/test/php/Dockerfile.arm64
+++ b/test/php/Dockerfile.arm64
@@ -45,7 +45,7 @@ RUN install-tool php 8.3.13
 FROM test-php AS test-composer
 
 # renovate: datasource=github-releases packageName=containerbase/composer-prebuild
-RUN install-tool composer 2.8.2
+RUN install-tool composer 2.8.3
 
 #--------------------------------------
 # Image: final