diff --git a/playground/package-lock.json b/playground/package-lock.json
index 3828c8c20..152fcba5c 100644
--- a/playground/package-lock.json
+++ b/playground/package-lock.json
@@ -3763,23 +3763,54 @@
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-        "schema-utils": "^1.0.0"
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+          "dev": true,
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+          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
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-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-1.0.0.tgz",
-          "integrity": "sha512-i27Mic4KovM/lnGsy8whRCHhc7VicJajAjTrYg11K9zfZXnYIt4k5F+kZkwjnrhKzLic/HLU4j11mjsz2G/75g==",
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-2.1.0.tgz",
+          "integrity": "sha512-g6SViEZAfGNrToD82ZPUjq52KUPDYc+fN5+g6Euo5mLokl/9Yx14z0Cu4RR1m55HtBXejO0sBt+qw79axN+Fiw==",
           "dev": true,
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@@ -4001,7 +4032,8 @@
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           "resolved": false,
           "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -4025,13 +4057,15 @@
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           "resolved": false,
           "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-          "dev": true
+          "dev": true,
+          "optional": true
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           "resolved": false,
           "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
           "dev": true,
+          "optional": true,
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@@ -4048,19 +4082,22 @@
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           "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "0.0.1",
           "resolved": false,
           "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
-          "dev": true
+          "dev": true,
+          "optional": true
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         "console-control-strings": {
           "version": "1.1.0",
           "resolved": false,
           "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-          "dev": true
+          "dev": true,
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@@ -4191,7 +4228,8 @@
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           "resolved": false,
           "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -4205,6 +4243,7 @@
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           "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -4221,6 +4260,7 @@
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           "dev": true,
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@@ -4229,13 +4269,15 @@
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           "resolved": false,
           "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
-          "dev": true
+          "dev": true,
+          "optional": true
         },
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           "resolved": false,
           "integrity": "sha512-hzXIWWet/BzWhYs2b+u7dRHlruXhwdgvlTMDKC6Cb1U7ps6Ac6yQlR39xsbjWJE377YTCtKwIXIpJ5oP+j5y8g==",
           "dev": true,
+          "optional": true,
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             "yallist": "^3.0.0"
@@ -4256,6 +4298,7 @@
           "resolved": false,
           "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
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@@ -4344,7 +4387,8 @@
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           "resolved": false,
           "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0=",
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
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@@ -4358,6 +4402,7 @@
           "resolved": false,
           "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -4453,7 +4498,8 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -4495,6 +4541,7 @@
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           "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -4516,6 +4563,7 @@
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           "dev": true,
+          "optional": true,
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@@ -4564,13 +4612,15 @@
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           "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-          "dev": true
+          "dev": true,
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           "version": "3.0.2",
           "resolved": false,
           "integrity": "sha1-hFK0u36Dx8GI2AQcGoN8dz1ti7k=",
-          "dev": true
+          "dev": true,
+          "optional": true
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     },
diff --git a/playground/package.json b/playground/package.json
index 7e0eeab0c..68ff0eef5 100644
--- a/playground/package.json
+++ b/playground/package.json
@@ -26,7 +26,7 @@
     "css-loader": "2.1.0",
     "eslint": "5.14.0",
     "eslint-config-google": "0.12.0",
-    "file-loader": "3.0.1",
+    "file-loader": "4.2.0",
     "google-closure-compiler": "20190121.0.0",
     "handlebars": "4.0.12",
     "handlebars-loader": "1.7.0",