diff --git a/packages/angular/cli/lib/config/schema.json b/packages/angular/cli/lib/config/schema.json
index 3fc2e39275bd..8a313ea14553 100644
--- a/packages/angular/cli/lib/config/schema.json
+++ b/packages/angular/cli/lib/config/schema.json
@@ -607,9 +607,28 @@
               "additionalProperties": false
             },
             "optimization": {
-              "type": "boolean",
               "description": "Enables optimization of the build output.",
-              "default": false
+              "oneOf": [
+                {
+                  "type": "object",
+                  "properties": {
+                    "scripts": {
+                      "type": "boolean",
+                      "description": "Enables optimization of the scripts output.",
+                      "default": true
+                    },
+                    "styles": {
+                      "type": "boolean",
+                      "description": "Enables optimization of the styles output.",
+                      "default": true
+                    }
+                  },
+                  "additionalProperties": false
+                },
+                {
+                  "type": "boolean"
+                }
+              ]
             },
             "fileReplacements": {
               "description": "Replace files with other files in the build.",
@@ -1067,8 +1086,28 @@
               "default": true
             },
             "optimization": {
-              "type": "boolean",
-              "description": "Enables optimization of the build output."
+              "description": "Enables optimization of the build output.",
+              "oneOf": [
+                {
+                  "type": "object",
+                  "properties": {
+                    "scripts": {
+                      "type": "boolean",
+                      "description": "Enables optimization of the scripts output.",
+                      "default": true
+                    },
+                    "styles": {
+                      "type": "boolean",
+                      "description": "Enables optimization of the styles output.",
+                      "default": true
+                    }
+                  },
+                  "additionalProperties": false
+                },
+                {
+                  "type": "boolean"
+                }
+              ]
             },
             "aot": {
               "type": "boolean",
@@ -1515,9 +1554,28 @@
               "additionalProperties": false
             },
             "optimization": {
-              "type": "boolean",
               "description": "Enables optimization of the build output.",
-              "default": false
+              "oneOf": [
+                {
+                  "type": "object",
+                  "properties": {
+                    "scripts": {
+                      "type": "boolean",
+                      "description": "Enables optimization of the scripts output.",
+                      "default": true
+                    },
+                    "styles": {
+                      "type": "boolean",
+                      "description": "Enables optimization of the styles output.",
+                      "default": true
+                    }
+                  },
+                  "additionalProperties": false
+                },
+                {
+                  "type": "boolean"
+                }
+              ]
             },
             "fileReplacements": {
               "description": "Replace files with other files in the build.",