diff --git a/README.md b/README.md
index f1a544115..e6f98f28c 100644
--- a/README.md
+++ b/README.md
@@ -30,15 +30,28 @@ If you have previously set up a v1 developer portal (non-SAM deployed), you will
 #### Deploy
 
 Run:
+
 >In the command below, replace the `your-lambda-artifacts-bucket-name` with the name of a bucket that you manage and that already exists. Then, run:
+
 ```bash
-sam package --template-file ./cloudformation/template.yaml --output-template-file ./cloudformation/packaged.yaml --s3-bucket your-lambda-artifacts-bucket-name
+sam package --template-file ./cloudformation/template.yaml \
+    --output-template-file ./cloudformation/packaged.yaml \
+    --s3-bucket your-lambda-artifacts-bucket-name
 ```
 
-Then run: 
+Then run:
+
 >In the command below, replace the `your-lambda-artifacts-bucket-name` with the name of a bucket that you manage and that already exists, and replace `custom-prefix` with some prefix that is globally unique, like your org name or username. Then, run:
+
 ```bash
-sam deploy --template-file ./cloudformation/packaged.yaml --stack-name "dev-portal" --s3-bucket your-lambda-artifacts-bucket-name --capabilities CAPABILITY_NAMED_IAM --parameter-overrides DevPortalSiteS3BucketName="custom-prefix-dev-portal-static-assets" ArtifactsS3BucketName="custom-prefix-dev-portal-artifacts" CognitoDomainNameOrPrefix="custom-prefix"
+sam deploy --template-file ./cloudformation/packaged.yaml \
+    --stack-name "dev-portal" \
+    --s3-bucket your-lambda-artifacts-bucket-name \
+    --capabilities CAPABILITY_NAMED_IAM \
+    --parameter-overrides \
+    DevPortalSiteS3BucketName="custom-prefix-dev-portal-static-assets" \
+    ArtifactsS3BucketName="custom-prefix-dev-portal-artifacts" \
+    CognitoDomainNameOrPrefix="custom-prefix"
 ```
 
 The command will exit when the stack creation is successful. If you'd like to watch it create in real-time, you can log into the cloudformation console.
@@ -46,7 +59,8 @@ The command will exit when the stack creation is successful. If you'd like to wa
 To get the URL for the newly created developer portal instance, find the websiteURL field in the cloudformation console's outputs or run this command:
 
 ```bash
-aws cloudformation describe-stacks --query "Stacks[?StackName=='dev-portal'][Outputs[?OutputKey=='WebsiteURL']][][].OutputValue"
+aws cloudformation describe-stacks --query \
+    "Stacks[?StackName=='dev-portal'][Outputs[?OutputKey=='WebsiteURL']][][].OutputValue"
 ```
 
 You can override any of the parameters in the template using the `--parameter-overrides key="value"` format. This will be necessary if you intend to deploy several instances of the developer portal or customize some of the features. You can see a full list of overridable parameters in `cloudformation/template.yaml` under the `Parameters` section.
diff --git a/cloudformation/template.yaml b/cloudformation/template.yaml
index 551cafc15..789c43e33 100644
--- a/cloudformation/template.yaml
+++ b/cloudformation/template.yaml
@@ -74,6 +74,10 @@ Parameters:
     Type: String
     Description: By default, a static asset rebuild doesn't overwrite custom-content. Provide the value `overwrite-content` to replace the custom-content with your local version. Don't do this unless you know what you're doing -- all custom changes in your s3 bucket will be lost. 
     Default: ''
+    AllowedValues:
+      - 'overwrite-content'
+      - ''
+    ConstraintDescription: Malformed input - Parameter StaticAssetRebuildMode value must be either 'overwrite-content' or left blank.
 
   MarketplaceSubscriptionTopicProductCode:
     Type: String
@@ -108,11 +112,19 @@ Parameters:
     Type: String
     Description: Only applicable if creating a custom domain name for your dev portal. Defaults to false, and you'll need to provide your own nameserver hosting. If set to true, a Route53 HostedZone and RecordSet are created for you.
     Default: 'false'
+    AllowedValues: 
+      - 'false'
+      - 'true'
+    ConstraintDescription: Malformed input - Parameter UseRoute53Nameservers value must be either 'true' or 'false'
 
   DevelopmentMode:
     Type: String
-    Description: Enabling this weakens security features (OAI, SSL, site S3 bucket with public read ACLs, Cognito callback verification, CORS, etc.) for easier development. Do not enable this in production! Additionally, do not update a stack that was previously in development mode to be a production stack; instead, make a new stack that has never been in development mode.
+    Description: Enabling this weakens security features (OAI, SSL, site S3 bucket with public read ACLs, Cognito callback verification, CORS, etc.) for easier development. It also breaks frontend routing (except to /index.html), including deep linking and page refresh. Do not enable this in production! Additionally, do not update a stack that was previously in development mode to be a production stack; instead, make a new stack that has never been in development mode.
     Default: 'false'
+    AllowedValues: 
+      - 'false'
+      - 'true'
+    ConstraintDescription: Malformed input - Parameter DevelopmentMode value must be either 'true' or 'false'
 
 Conditions:
   UseCustomDomainName: !And [!And [!Not [!Equals [!Ref CustomDomainName, '']], !Not [!Equals [!Ref CustomDomainNameAcmCertArn, '']]], !Condition NotDevelopmentMode]
diff --git a/dev-portal/package-lock.json b/dev-portal/package-lock.json
index 5ce481058..f16dd673b 100644
--- a/dev-portal/package-lock.json
+++ b/dev-portal/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "dev-portal",
-  "version": "2.3.2",
+  "version": "3.0.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -3196,7 +3196,8 @@
             },
             "ansi-regex": {
               "version": "2.1.1",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "aproba": {
               "version": "1.2.0",
@@ -3214,11 +3215,13 @@
             },
             "balanced-match": {
               "version": "1.0.0",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "brace-expansion": {
               "version": "1.1.11",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "balanced-match": "^1.0.0",
                 "concat-map": "0.0.1"
@@ -3231,15 +3234,18 @@
             },
             "code-point-at": {
               "version": "1.1.0",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "concat-map": {
               "version": "0.0.1",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "console-control-strings": {
               "version": "1.1.0",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "core-util-is": {
               "version": "1.0.2",
@@ -3342,7 +3348,8 @@
             },
             "inherits": {
               "version": "2.0.3",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "ini": {
               "version": "1.3.5",
@@ -3352,6 +3359,7 @@
             "is-fullwidth-code-point": {
               "version": "1.0.0",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "number-is-nan": "^1.0.0"
               }
@@ -3364,17 +3372,20 @@
             "minimatch": {
               "version": "3.0.4",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "brace-expansion": "^1.1.7"
               }
             },
             "minimist": {
               "version": "0.0.8",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "minipass": {
               "version": "2.3.5",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "safe-buffer": "^5.1.2",
                 "yallist": "^3.0.0"
@@ -3391,6 +3402,7 @@
             "mkdirp": {
               "version": "0.5.1",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "minimist": "0.0.8"
               }
@@ -3463,7 +3475,8 @@
             },
             "number-is-nan": {
               "version": "1.0.1",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "object-assign": {
               "version": "4.1.1",
@@ -3473,6 +3486,7 @@
             "once": {
               "version": "1.4.0",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "wrappy": "1"
               }
@@ -3548,7 +3562,8 @@
             },
             "safe-buffer": {
               "version": "5.1.2",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -3578,6 +3593,7 @@
             "string-width": {
               "version": "1.0.2",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "code-point-at": "^1.0.0",
                 "is-fullwidth-code-point": "^1.0.0",
@@ -3595,6 +3611,7 @@
             "strip-ansi": {
               "version": "3.0.1",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "ansi-regex": "^2.0.0"
               }
@@ -3633,11 +3650,13 @@
             },
             "wrappy": {
               "version": "1.0.2",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "yallist": {
               "version": "3.0.3",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             }
           }
         },
@@ -6989,7 +7008,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -7010,12 +7030,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -7030,17 +7052,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -7157,7 +7182,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -7169,6 +7195,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -7183,6 +7210,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -7190,12 +7218,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -7214,6 +7244,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -7294,7 +7325,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -7306,6 +7338,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -7391,7 +7424,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -7427,6 +7461,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -7446,6 +7481,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -7489,12 +7525,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -10263,7 +10301,8 @@
     "map-obj": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/map-obj/-/map-obj-1.0.1.tgz",
-      "integrity": "sha1-2TPOuSBdgr3PSIb2dCvcK03qFG0="
+      "integrity": "sha1-2TPOuSBdgr3PSIb2dCvcK03qFG0=",
+      "optional": true
     },
     "map-visit": {
       "version": "1.0.0",
@@ -16837,7 +16876,8 @@
         "camelcase": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz",
-          "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo="
+          "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo=",
+          "optional": true
         },
         "cliui": {
           "version": "3.2.0",
@@ -16905,6 +16945,7 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
           "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -17054,6 +17095,7 @@
           "version": "1.0.2",
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
           "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
diff --git a/dev-portal/src/index.js b/dev-portal/src/index.js
index 3fe942012..bc991d91a 100644
--- a/dev-portal/src/index.js
+++ b/dev-portal/src/index.js
@@ -62,6 +62,9 @@ class App extends React.Component {
           <GlobalModal />
           <Switch>
             <Route exact path="/" component={Home} />
+            <Route exact path="/index.html" component={() =>
+              <Redirect to="/"/>
+            } />
             <Route path="/getting-started" component={GettingStarted} />
             <Route path="/dashboard" component={Dashboard} />
             <AdminRoute path="/admin" component={Admin} />
diff --git a/package.json b/package.json
index 9d3b262d1..7c50271cc 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "Serverless Developer Portal for API Gateway",
   "main": "lambda.js",
   "scripts": {
-    "get-dependencies": "npm run get-dev-portal-dependencies && npm run get-lambda-dependencies;",
+    "get-dependencies": "npm install && npm run get-dev-portal-dependencies && npm run get-lambda-dependencies;",
     "get-lambda-dependencies": "find lambdas/*/package.json -type f -exec sh -c 'cd $(dirname {}) && npm run get-dependencies' \\;",
     "get-dev-portal-dependencies": "(cd dev-portal; npm run get-dependencies)",
     "test": "node scripts/test.js",