diff --git a/delta_backend/Dockerfile b/delta_backend/Dockerfile
index d00d623e0..ff89c35f5 100644
--- a/delta_backend/Dockerfile
+++ b/delta_backend/Dockerfile
@@ -1,4 +1,4 @@
-FROM public.ecr.aws/lambda/python:3.11 AS base
+FROM public.ecr.aws/lambda/python:3.13 AS base
 
 # Create a non-root user with a specific UID and GID
 RUN mkdir -p /home/appuser && \
diff --git a/filenameprocessor/Dockerfile b/filenameprocessor/Dockerfile
index 7d90bfef9..21f3df796 100644
--- a/filenameprocessor/Dockerfile
+++ b/filenameprocessor/Dockerfile
@@ -1,4 +1,4 @@
-FROM public.ecr.aws/lambda/python:3.11 AS base
+FROM public.ecr.aws/lambda/python:3.13 AS base
 
 # Create non-root user
 RUN mkdir -p /home/appuser && \
diff --git a/filenameprocessor/batch.Dockerfile b/filenameprocessor/batch.Dockerfile
index e2b59910a..075c2b283 100644
--- a/filenameprocessor/batch.Dockerfile
+++ b/filenameprocessor/batch.Dockerfile
@@ -1,4 +1,4 @@
-FROM public.ecr.aws/lambda/python:3.11 as base
+FROM public.ecr.aws/lambda/python:3.13 as base
 
 RUN pip install "poetry~=2.1.4"
 
diff --git a/lambdas/ack_backend/Dockerfile b/lambdas/ack_backend/Dockerfile
index ffa2a52da..4b34db84c 100644
--- a/lambdas/ack_backend/Dockerfile
+++ b/lambdas/ack_backend/Dockerfile
@@ -1,4 +1,4 @@
-FROM public.ecr.aws/lambda/python:3.11 AS base
+FROM public.ecr.aws/lambda/python:3.13 AS base
 
 RUN mkdir -p /home/appuser && \
     echo 'appuser:x:1001:1001::/home/appuser:/sbin/nologin' >> /etc/passwd && \
diff --git a/mesh_processor/Dockerfile b/mesh_processor/Dockerfile
index 848cd1300..2437cc964 100644
--- a/mesh_processor/Dockerfile
+++ b/mesh_processor/Dockerfile
@@ -1,4 +1,4 @@
-FROM public.ecr.aws/lambda/python:3.11 AS base
+FROM public.ecr.aws/lambda/python:3.13 AS base
 
 # Create a non-root user with a specific UID and GID
 RUN mkdir -p /home/appuser && \
diff --git a/recordprocessor/Dockerfile b/recordprocessor/Dockerfile
index 22e6bce2d..588a14cde 100644
--- a/recordprocessor/Dockerfile
+++ b/recordprocessor/Dockerfile
@@ -1,4 +1,4 @@
-FROM public.ecr.aws/lambda/python:3.11 AS base
+FROM public.ecr.aws/lambda/python:3.13 AS base
 
 # Create a non-root user with a specific UID and GID
 RUN mkdir -p /home/appuser && \
diff --git a/temporary_sandbox/Dockerfile b/temporary_sandbox/Dockerfile
index 7535d630d..e7f9a75a1 100644
--- a/temporary_sandbox/Dockerfile
+++ b/temporary_sandbox/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9-slim
+FROM python:3.13-slim
  
 # Install Poetry
 RUN pip install poetry && groupadd -r appgroup && useradd -r -g appgroup appuser