diff --git a/Dockerfile b/Dockerfile
index b14d29e..9cc52af 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # ---- Build stage ----
-FROM public.ecr.aws/lambda/python:3.14 AS builder
+FROM public.ecr.aws/lambda/python:3.15@sha256:a843a538de7d2772d637644d129db4820c27e8d9a5083f098349d77541fd70a5 AS builder
 
-COPY --from=ghcr.io/astral-sh/uv:0.10.7 /uv /uvx /bin/
+COPY --from=ghcr.io/astral-sh/uv:0.11.29@sha256:eb2843a1e56fd9e30c7276ce1a52cba86e64c7b385f5e3279a0e08e02dd058fc /uv /uvx /bin/
 
 COPY pyproject.toml uv.lock ${LAMBDA_TASK_ROOT}/
 
@@ -12,7 +12,7 @@ RUN cd ${LAMBDA_TASK_ROOT} && \
 COPY . ${LAMBDA_TASK_ROOT}/
 
 # ---- Runtime stage ----
-FROM public.ecr.aws/lambda/python:3.14
+FROM public.ecr.aws/lambda/python:3.15@sha256:a843a538de7d2772d637644d129db4820c27e8d9a5083f098349d77541fd70a5
 
 COPY --from=builder ${LAMBDA_TASK_ROOT} ${LAMBDA_TASK_ROOT}