diff --git a/components/tensorflow-notebook-image/Dockerfile b/components/tensorflow-notebook-image/Dockerfile
index e57242358e4..01e4d4fad0d 100644
--- a/components/tensorflow-notebook-image/Dockerfile
+++ b/components/tensorflow-notebook-image/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
 
-ARG BASE_IMAGE=ubuntu:latest
+ARG BASE_IMAGE=ubuntu:18.04@sha256:de774a3145f7ca4f0bd144c7d4ffb2931e06634f11529653b23eba85aef8e378
 
 FROM $BASE_IMAGE
 
diff --git a/components/tensorflow-notebook-image/versions/1.10.1/version-config.json b/components/tensorflow-notebook-image/versions/1.10.1/version-config.json
index cc4cd44380c..369a2f18adb 100644
--- a/components/tensorflow-notebook-image/versions/1.10.1/version-config.json
+++ b/components/tensorflow-notebook-image/versions/1.10.1/version-config.json
@@ -1,5 +1,5 @@
 {
-  "BASE_IMAGE": "ubuntu:latest",
+  "BASE_IMAGE": "ubuntu:18.04@sha256:de774a3145f7ca4f0bd144c7d4ffb2931e06634f11529653b23eba85aef8e378",
   "TF_PACKAGE": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.10.1-cp36-cp36m-linux_x86_64.whl",
   "TF_PACKAGE_PY_27": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.10.1-cp27-none-linux_x86_64.whl",
   "TFMA_VERSION": "0.9.2",
diff --git a/components/tensorflow-notebook-image/versions/1.4.1/version-config.json b/components/tensorflow-notebook-image/versions/1.4.1/version-config.json
index 821b562c189..266036b8eb2 100644
--- a/components/tensorflow-notebook-image/versions/1.4.1/version-config.json
+++ b/components/tensorflow-notebook-image/versions/1.4.1/version-config.json
@@ -1,5 +1,5 @@
 {
-  "BASE_IMAGE": "ubuntu:latest",
+  "BASE_IMAGE": "ubuntu:18.04@sha256:de774a3145f7ca4f0bd144c7d4ffb2931e06634f11529653b23eba85aef8e378",
   "TF_PACKAGE": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.4.1-cp36-cp36m-linux_x86_64.whl",
   "TF_PACKAGE_PY_27": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.4.1-cp27-none-linux_x86_64.whl",
   "TF_SERVING_VERSION": "1.4.0"
diff --git a/components/tensorflow-notebook-image/versions/1.5.1/version-config.json b/components/tensorflow-notebook-image/versions/1.5.1/version-config.json
index 131b979c44e..02fba140112 100644
--- a/components/tensorflow-notebook-image/versions/1.5.1/version-config.json
+++ b/components/tensorflow-notebook-image/versions/1.5.1/version-config.json
@@ -1,5 +1,5 @@
 {
-  "BASE_IMAGE": "ubuntu:latest",
+  "BASE_IMAGE": "ubuntu:18.04@sha256:de774a3145f7ca4f0bd144c7d4ffb2931e06634f11529653b23eba85aef8e378",
   "TF_PACKAGE": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.5.1-cp36-cp36m-linux_x86_64.whl",
   "TF_PACKAGE_PY_27": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.5.1-cp27-none-linux_x86_64.whl",
   "TF_SERVING_VERSION": "1.5.0"
diff --git a/components/tensorflow-notebook-image/versions/1.6.0/version-config.json b/components/tensorflow-notebook-image/versions/1.6.0/version-config.json
index b40f6dd006e..0d728ff22bb 100644
--- a/components/tensorflow-notebook-image/versions/1.6.0/version-config.json
+++ b/components/tensorflow-notebook-image/versions/1.6.0/version-config.json
@@ -1,5 +1,5 @@
 {
-  "BASE_IMAGE": "ubuntu:latest",
+  "BASE_IMAGE": "ubuntu:18.04@sha256:de774a3145f7ca4f0bd144c7d4ffb2931e06634f11529653b23eba85aef8e378",
   "TF_PACKAGE": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.6.0-cp36-cp36m-linux_x86_64.whl",
   "TF_PACKAGE_PY_27": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.6.0-cp27-none-linux_x86_64.whl",
   "TFMA_VERSION": "0.6.0",
diff --git a/components/tensorflow-notebook-image/versions/1.7.0/version-config.json b/components/tensorflow-notebook-image/versions/1.7.0/version-config.json
index cda1ac7ae15..40da83b3c75 100644
--- a/components/tensorflow-notebook-image/versions/1.7.0/version-config.json
+++ b/components/tensorflow-notebook-image/versions/1.7.0/version-config.json
@@ -1,5 +1,5 @@
 {
-  "BASE_IMAGE": "ubuntu:latest",
+  "BASE_IMAGE": "ubuntu:18.04@sha256:de774a3145f7ca4f0bd144c7d4ffb2931e06634f11529653b23eba85aef8e378",
   "TF_PACKAGE": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.7.0-cp36-cp36m-linux_x86_64.whl",
   "TF_PACKAGE_PY_27": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.7.0-cp27-none-linux_x86_64.whl",  
   "TFMA_VERSION": "0.6.0",
diff --git a/components/tensorflow-notebook-image/versions/1.8.0/version-config.json b/components/tensorflow-notebook-image/versions/1.8.0/version-config.json
index 4c7f25513fd..fcddcd40c36 100644
--- a/components/tensorflow-notebook-image/versions/1.8.0/version-config.json
+++ b/components/tensorflow-notebook-image/versions/1.8.0/version-config.json
@@ -1,5 +1,5 @@
 {
-  "BASE_IMAGE": "ubuntu:latest",
+  "BASE_IMAGE": "ubuntu:18.04@sha256:de774a3145f7ca4f0bd144c7d4ffb2931e06634f11529653b23eba85aef8e378",
   "TF_PACKAGE": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.8.0-cp36-cp36m-linux_x86_64.whl",
   "TF_PACKAGE_PY_27": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.8.0-cp27-none-linux_x86_64.whl",
   "TFMA_VERSION": "0.6.0",
diff --git a/components/tensorflow-notebook-image/versions/1.9.0/version-config.json b/components/tensorflow-notebook-image/versions/1.9.0/version-config.json
index 7d4c985bb8e..2e49df8fc07 100644
--- a/components/tensorflow-notebook-image/versions/1.9.0/version-config.json
+++ b/components/tensorflow-notebook-image/versions/1.9.0/version-config.json
@@ -1,5 +1,5 @@
 {
-  "BASE_IMAGE": "ubuntu:latest",
+  "BASE_IMAGE": "ubuntu:18.04@sha256:de774a3145f7ca4f0bd144c7d4ffb2931e06634f11529653b23eba85aef8e378",
   "TF_PACKAGE": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.9.0-cp36-cp36m-linux_x86_64.whl",
   "TF_PACKAGE_PY_27": "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.9.0-cp27-none-linux_x86_64.whl",
   "TFMA_VERSION": "0.9.2",