diff --git a/test/nix/Dockerfile b/test/nix/Dockerfile
index cdbe0e9b50..f81f3f69fe 100644
--- a/test/nix/Dockerfile
+++ b/test/nix/Dockerfile
@@ -71,7 +71,7 @@ FROM base AS testb
 USER 12021
 
 # renovate: datasource=github-releases packageName=containerbase/nix-prebuild
-RUN install-tool nix 2.31.0
+RUN install-tool nix 2.31.1
 
 RUN set -ex; \
   nix --version
diff --git a/test/nix/Dockerfile.arm64 b/test/nix/Dockerfile.arm64
index f114861d08..8d5cbc887e 100644
--- a/test/nix/Dockerfile.arm64
+++ b/test/nix/Dockerfile.arm64
@@ -38,7 +38,7 @@ ARG CONTAINERBASE_LOG_LEVEL
 FROM base AS test-nix
 
 # renovate: datasource=github-releases packageName=containerbase/nix-prebuild
-RUN install-tool nix 2.31.0
+RUN install-tool nix 2.31.1
 
 #--------------------------------------
 # Image: final