diff --git a/06-building-container-images/api-node/Dockerfile.1 b/06-building-container-images/api-node/Dockerfile.1
index fcebc97..a0e56d4 100644
--- a/06-building-container-images/api-node/Dockerfile.1
+++ b/06-building-container-images/api-node/Dockerfile.1
@@ -1,6 +1,6 @@
 # Pin specific version
-# Use alpine for reduced image size
-FROM node:19.6-alpine
+# Use slim for reduced image size
+FROM node:19.6-bullseye-slim
 
 COPY . .
 
diff --git a/06-building-container-images/api-node/Dockerfile.2 b/06-building-container-images/api-node/Dockerfile.2
index 568b7f5..45d593f 100644
--- a/06-building-container-images/api-node/Dockerfile.2
+++ b/06-building-container-images/api-node/Dockerfile.2
@@ -1,6 +1,6 @@
 # Pin specific version
-# Use alpine for reduced image size
-FROM node:19.6-alpine
+# Use slim for reduced image size
+FROM node:19.6-bullseye-slim
 
 # Specify working directory other than /
 WORKDIR /usr/src/app
diff --git a/06-building-container-images/api-node/Dockerfile.3 b/06-building-container-images/api-node/Dockerfile.3
index 7b2a874..533bec8 100644
--- a/06-building-container-images/api-node/Dockerfile.3
+++ b/06-building-container-images/api-node/Dockerfile.3
@@ -1,6 +1,6 @@
 # Pin specific version for stability
-# Use alpine for reduced image size
-FROM node:19.6-alpine
+# Use slim for reduced image size
+FROM node:19.6-bullseye-slim
 
 # Specify working directory other than /
 WORKDIR /usr/src/app
diff --git a/06-building-container-images/api-node/Dockerfile.4 b/06-building-container-images/api-node/Dockerfile.4
index 787d48b..f88c8d2 100644
--- a/06-building-container-images/api-node/Dockerfile.4
+++ b/06-building-container-images/api-node/Dockerfile.4
@@ -1,6 +1,6 @@
 # Pin specific version for stability
-# Use alpine for reduced image size
-FROM node:19.6-alpine
+# Use slim for reduced image size
+FROM node:19.6-bullseye-slim
 
 # Specify working directory other than /
 WORKDIR /usr/src/app
diff --git a/06-building-container-images/api-node/Dockerfile.5 b/06-building-container-images/api-node/Dockerfile.5
index 099be27..3b1f0aa 100644
--- a/06-building-container-images/api-node/Dockerfile.5
+++ b/06-building-container-images/api-node/Dockerfile.5
@@ -1,6 +1,6 @@
 # Pin specific version for stability
-# Use alpine for reduced image size
-FROM node:19.6-alpine
+# Use slim for reduced image size
+FROM node:19.6-bullseye-slim
 
 # Set NODE_ENV
 ENV NODE_ENV production
diff --git a/06-building-container-images/api-node/Dockerfile.6 b/06-building-container-images/api-node/Dockerfile.6
index 7eb4a52..b98da23 100644
--- a/06-building-container-images/api-node/Dockerfile.6
+++ b/06-building-container-images/api-node/Dockerfile.6
@@ -1,6 +1,6 @@
 # Pin specific version for stability
-# Use alpine for reduced image size
-FROM node:19.6-alpine
+# Use slim for reduced image size
+FROM node:19.6-bullseye-slim
 
 # Set NODE_ENV
 ENV NODE_ENV production
diff --git a/06-building-container-images/api-node/Dockerfile.7 b/06-building-container-images/api-node/Dockerfile.7
index b45dc22..01fc8d4 100644
--- a/06-building-container-images/api-node/Dockerfile.7
+++ b/06-building-container-images/api-node/Dockerfile.7
@@ -1,6 +1,6 @@
 # Pin specific version for stability
-# Use alpine for reduced image size
-FROM node:19.6-alpine
+# Use slim for reduced image size
+FROM node:19.6-bullseye-slim
 
 # Set NODE_ENV
 ENV NODE_ENV production
diff --git a/06-building-container-images/api-node/Dockerfile.8 b/06-building-container-images/api-node/Dockerfile.8
index 2bdc121..7a751f5 100644
--- a/06-building-container-images/api-node/Dockerfile.8
+++ b/06-building-container-images/api-node/Dockerfile.8
@@ -1,6 +1,6 @@
 # Pin specific version for stability
-# Use alpine for reduced image size
-FROM node:19.6-alpine
+# Use slim for reduced image size
+FROM node:19.6-bullseye-slim
 
 # Set NODE_ENV
 ENV NODE_ENV production
diff --git a/06-building-container-images/api-node/Dockerfile.9 b/06-building-container-images/api-node/Dockerfile.9
index 3930047..2ec0cd1 100644
--- a/06-building-container-images/api-node/Dockerfile.9
+++ b/06-building-container-images/api-node/Dockerfile.9
@@ -1,6 +1,6 @@
 # Pin specific version for stability
-# Use alpine for reduced image size
-FROM node:19.6-alpine AS base
+# Use slim for reduced image size
+FROM node:19.6-bullseye-slim AS base
 
 # Specify working directory other than /
 WORKDIR /usr/src/app