diff --git a/images/linux/ubuntu1604.json b/images/linux/ubuntu1604.json
index a1e9d27f..ca7923a3 100644
--- a/images/linux/ubuntu1604.json
+++ b/images/linux/ubuntu1604.json
@@ -22,6 +22,7 @@
         "capture_name_prefix": "packer",
         "image_version": "dev"
     },
+    "sensitive-variables": ["client_secret"],
     "builders": [
         {
             "type": "azure-arm",
diff --git a/images/linux/ubuntu1804.json b/images/linux/ubuntu1804.json
index 2c10a682..fa5e66f0 100644
--- a/images/linux/ubuntu1804.json
+++ b/images/linux/ubuntu1804.json
@@ -22,6 +22,7 @@
         "capture_name_prefix": "packer",
         "image_version": "dev"
     },
+    "sensitive-variables": ["client_secret"],
     "builders": [
         {
             "type": "azure-arm",
diff --git a/images/win/Windows2016-Azure.json b/images/win/Windows2016-Azure.json
index c51dcdfe..fe713179 100644
--- a/images/win/Windows2016-Azure.json
+++ b/images/win/Windows2016-Azure.json
@@ -26,6 +26,7 @@
         "capture_name_prefix": "packer",
         "image_version": "dev"
     },
+    "sensitive-variables": ["install_password", "ssh_password", "client_secret"],
     "builders": [
         {
             "name": "vhd",