diff --git a/package-lock.json b/package-lock.json
index 9f5c3103..a684b357 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "firebaseui",
-  "version": "3.2.0",
+  "version": "3.4.1",
   "lockfileVersion": 1,
   "requires": true,
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@@ -447,12 +447,6 @@
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-      "resolved": "https://registry.npmjs.org/aproba/-/aproba-1.2.0.tgz",
-      "integrity": "sha512-Y9J6ZjXtoYh8RnXVCMOU/ttDmk1aBjunq9vO0ta5x85WDQiQfUF9sIPBITdbiiIVcBo03Hi3jMxigBtsddlXRw==",
-      "dev": true
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       "resolved": "https://registry.npmjs.org/archiver/-/archiver-2.1.1.tgz",
@@ -489,16 +483,6 @@
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       "dev": true
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-      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.4.tgz",
-      "integrity": "sha1-u13KOCu5TwXhUZQ3PRb9O6HKEQ0=",
-      "dev": true,
-      "requires": {
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       "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
@@ -754,12 +738,6 @@
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       "dev": true
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-      "resolved": "https://registry.npmjs.org/async-foreach/-/async-foreach-0.1.3.tgz",
-      "integrity": "sha1-NhIfhFwFeBct5Bmpfb6x0W7DRUI=",
-      "dev": true
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       "resolved": "https://registry.npmjs.org/async-settle/-/async-settle-1.0.0.tgz",
@@ -798,6 +776,7 @@
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       "integrity": "sha1-MtU+SFHv3AoRmTts0AB4nXDAUQI=",
       "dev": true,
+      "optional": true,
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         "is-buffer": "^1.1.5"
@@ -939,15 +918,6 @@
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-      "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz",
-      "integrity": "sha1-E+v+d4oDIFz+A3UUgeu0szAMEmo=",
-      "dev": true,
-      "requires": {
-        "inherits": "~2.0.0"
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       "resolved": "https://registry.npmjs.org/blocking-proxy/-/blocking-proxy-1.0.1.tgz",
@@ -968,6 +938,7 @@
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       "integrity": "sha1-h2eKGdhLR9hZuDGZvVm84iKxBFQ=",
       "dev": true,
+      "optional": true,
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         "content-type": "~1.0.4",
@@ -986,6 +957,7 @@
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           "dev": true,
+          "optional": true,
           "requires": {
             "ms": "2.0.0"
           }
@@ -1744,6 +1716,21 @@
         "object-visit": "^1.0.0"
       }
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+    "color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "dev": true,
+      "requires": {
+        "color-name": "~1.1.4"
+      }
+    },
+    "color-name": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/color-support/-/color-support-1.1.3.tgz",
@@ -1754,7 +1741,8 @@
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       "integrity": "sha1-FopHAXVran9RoSzgyXv6KMCE7WM=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2006,12 +1994,6 @@
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-      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true
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@@ -2239,7 +2221,8 @@
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       "integrity": "sha1-ojD2T1aDEOFJgAmUB5DsmVRbyn4=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2622,12 +2605,6 @@
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-      "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz",
-      "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=",
-      "dev": true
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@@ -2707,6 +2684,7 @@
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       "dev": true,
+      "optional": true,
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@@ -4574,6 +4552,7 @@
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       "dev": true,
+      "optional": true,
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       }
@@ -4722,7 +4701,8 @@
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           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -4743,12 +4723,14 @@
         "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": {
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@@ -4763,17 +4745,20 @@
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           "version": "1.1.0",
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-          "dev": true
+          "dev": true,
+          "optional": true
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         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -4890,7 +4875,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -4902,6 +4888,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
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           }
@@ -4916,6 +4903,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -4923,12 +4911,14 @@
         "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": {
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@@ -4947,6 +4937,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -5034,7 +5025,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -5046,6 +5038,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -5131,7 +5124,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "2.1.2",
@@ -5167,6 +5161,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -5186,6 +5181,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -5229,54 +5225,29 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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-      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.11.tgz",
-      "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
-      "dev": true,
-      "requires": {
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-        "inherits": "~2.0.0",
-        "mkdirp": ">=0.5 0",
-        "rimraf": "2"
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       "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==",
       "dev": true
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-    "gauge": {
-      "version": "2.7.4",
-      "resolved": "https://registry.npmjs.org/gauge/-/gauge-2.7.4.tgz",
-      "integrity": "sha1-LANAXHU4w51+s3sxcCLjJfsBi/c=",
-      "dev": true,
-      "requires": {
-        "aproba": "^1.0.3",
-        "console-control-strings": "^1.0.0",
-        "has-unicode": "^2.0.0",
-        "object-assign": "^4.1.0",
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-        "string-width": "^1.0.1",
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       "dev": true,
+      "optional": true,
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@@ -5535,6 +5506,7 @@
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+      "optional": true,
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@@ -5550,6 +5522,7 @@
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@@ -5682,6 +5655,7 @@
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@@ -5691,7 +5665,8 @@
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           "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=",
-          "dev": true
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@@ -5822,6 +5797,7 @@
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       "dev": true,
+      "optional": true,
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@@ -5834,7 +5810,8 @@
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           "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=",
-          "dev": true
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@@ -6486,16 +6463,87 @@
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-      "integrity": "sha1-grerkP6QLNw0wE8YDZLyw0kC3VI=",
+      "version": "5.0.0",
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-        "node-sass": "^3.4.2",
-        "through2": "^2.0.0",
-        "vinyl-sourcemaps-apply": "^0.2.0"
+        "chalk": "^4.1.1",
+        "lodash": "^4.17.20",
+        "plugin-error": "^1.0.1",
+        "replace-ext": "^2.0.0",
+        "strip-ansi": "^6.0.0",
+        "transfob": "^1.0.0",
+        "vinyl-sourcemaps-apply": "^0.2.1"
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+          "dev": true,
+          "requires": {
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+        "chalk": {
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+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+          "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^4.1.0",
+            "supports-color": "^7.1.0"
+          }
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+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+          "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
+          "dev": true
+        },
+        "plugin-error": {
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+          "resolved": "https://registry.npmjs.org/plugin-error/-/plugin-error-1.0.1.tgz",
+          "integrity": "sha512-L1zP0dk7vGweZME2i+EeakvUNqSrdiI3F91TwEoYiGrAfUXmVv6fJIq4g82PAXxNsWOp0J7ZqQy/3Szz0ajTxA==",
+          "dev": true,
+          "requires": {
+            "ansi-colors": "^1.0.1",
+            "arr-diff": "^4.0.0",
+            "arr-union": "^3.1.0",
+            "extend-shallow": "^3.0.2"
+          }
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+        "replace-ext": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/replace-ext/-/replace-ext-2.0.0.tgz",
+          "integrity": "sha512-UszKE5KVK6JvyD92nzMn9cDapSk6w/CaFZ96CnmDMUqH9oowfxF/ZjRITD25H4DnOQClLA4/j7jLGXXLVKxAug==",
+          "dev": true
+        },
+        "strip-ansi": {
+          "version": "6.0.1",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+          "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^5.0.1"
+          }
+        },
+        "supports-color": {
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+          "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^4.0.0"
+          }
+        }
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     "gulp-util": {
@@ -6575,6 +6623,12 @@
         "ansi-regex": "^2.0.0"
       }
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+    "has-flag": {
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+          "optional": true,
           "requires": {
             "ansi-regex": "^3.0.0"
           }
diff --git a/package.json b/package.json
index 94c37d73..15e885c6 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "gulp-connect": "^5.5.0",
     "gulp-css-flip": "^0.4.0",
     "gulp-css-inline-images": "^0.1.1",
-    "gulp-sass": "^2.3.2",
+    "gulp-sass": "^5.0.0",
     "gulp-util": "^3.0.7",
     "material-design-lite": "^1.2.0",
     "protractor": "^5.3.2",