diff --git a/Dockerfile b/Dockerfile
index 93cbef5..bbebd64 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,7 +34,7 @@ WORKDIR /app
 # renovate: datasource=repology depName=alpine_3_21/gcc versioning=loose
 ENV GCC_VERSION="14.2.0-r4"
 # renovate: datasource=repology depName=alpine_3_21/musl-dev versioning=loose
-ENV MUSL_DEV_VERSION="1.2.5-r8"
+ENV MUSL_DEV_VERSION="1.2.5-r9"
 # renovate: datasource=repology depName=alpine_3_21/mupdf versioning=loose
 ENV MUPDF_VERSION="1.24.10-r0"
 # renovate: datasource=repology depName=alpine_3_21/mupdf-dev versioning=loose