diff --git a/test/Dockerfile.jammy b/test/Dockerfile.jammy
index 778cdeaf5..27aeb0136 100644
--- a/test/Dockerfile.jammy
+++ b/test/Dockerfile.jammy
@@ -125,7 +125,7 @@ FROM build as test-php
 # renovate: datasource=github-releases packageName=containerbase/php-prebuild
 RUN install-tool php 8.2.10
 # renovate: datasource=github-releases packageName=composer/composer
-RUN install-tool composer 2.6.2
+RUN install-tool composer 2.6.3
 
 #--------------------------------------
 # Image: test-python
diff --git a/test/php/Dockerfile b/test/php/Dockerfile
index d4c5ac4d1..e64effc73 100644
--- a/test/php/Dockerfile
+++ b/test/php/Dockerfile
@@ -108,7 +108,7 @@ RUN install-tool php 8.2.10
 
 
 # renovate: datasource=github-releases packageName=composer/composer
-RUN install-tool composer 2.6.2
+RUN install-tool composer 2.6.3
 
 RUN install-tool composer latest
 
@@ -151,7 +151,7 @@ RUN install-tool php 8.2.10
 RUN install-tool composer latest
 
 # renovate: datasource=github-releases packageName=composer/composer
-RUN install-tool composer 2.6.2
+RUN install-tool composer 2.6.3
 
 
 RUN set -ex; \
diff --git a/test/php/Dockerfile.arm64 b/test/php/Dockerfile.arm64
index 8a3ad4cad..eae54249e 100644
--- a/test/php/Dockerfile.arm64
+++ b/test/php/Dockerfile.arm64
@@ -29,7 +29,7 @@ RUN install-tool php 8.2.10
 FROM test-php as test-composer
 
 # renovate: datasource=github-releases packageName=composer/composer
-RUN install-tool composer 2.6.2
+RUN install-tool composer 2.6.3
 
 #--------------------------------------
 # Image: final