diff --git a/package-lock.json b/package-lock.json
index a44c27e..d784f86 100644
--- a/package-lock.json
+++ b/package-lock.json
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+      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.6.tgz",
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-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
-      "dev": true
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@@ -1114,12 +1114,6 @@
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-      "resolved": "https://registry.npmjs.org/async/-/async-0.9.2.tgz",
-      "integrity": "sha1-rqdNXmHB+JlhO/ZL2mbUx48v0X0=",
-      "dev": true
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@@ -4000,13 +3994,10 @@
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-      "resolved": "https://registry.npmjs.org/json5/-/json5-2.1.0.tgz",
-      "integrity": "sha512-8Mh9h6xViijj36g7Dxi+Y4S6hNGV96vcJZr/SrlHh1LR/pEn/8j/+qIBbs44YKl69Lrfctp4QD+AdWLTMqEZAQ==",
-      "dev": true,
-      "requires": {
-        "minimist": "^1.2.0"
-      }
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
+      "integrity": "sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==",
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@@ -4093,9 +4084,9 @@
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-          "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.1.tgz",
-          "integrity": "sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==",
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.2.tgz",
+          "integrity": "sha512-g1MWMLBiz8FKi1e4w0UyVL3w+iJceWAFBAaBnnGKOpNa5f8TLktkbre1+s6oICydWAm+HRUGTmI+//xv2hvXYA==",
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@@ -5406,48 +5397,30 @@
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+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz",
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-      "resolved": "https://registry.npmjs.org/source-map-loader/-/source-map-loader-0.1.6.tgz",
-      "integrity": "sha1-wJkD2m1zueU7ftjuUkVZcFHpjpE=",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/source-map-loader/-/source-map-loader-4.0.1.tgz",
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-        "async": "^0.9.0",
-        "loader-utils": "~0.2.2",
-        "source-map": "~0.1.33"
+        "abab": "^2.0.6",
+        "iconv-lite": "^0.6.3",
+        "source-map-js": "^1.0.2"
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-          "resolved": "https://registry.npmjs.org/big.js/-/big.js-3.2.0.tgz",
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-          "dev": true
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-        "json5": {
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-          "resolved": "https://registry.npmjs.org/json5/-/json5-0.5.1.tgz",
-          "integrity": "sha1-Hq3nrMASA0rYTiOWdn6tn6VJWCE=",
-          "dev": true
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-        "loader-utils": {
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-          "resolved": "https://registry.npmjs.org/loader-utils/-/loader-utils-0.2.17.tgz",
-          "integrity": "sha1-+G5jdNQyBabmxg6RlvF8Apm/s0g=",
-          "dev": true,
-          "requires": {
-            "big.js": "^3.1.3",
-            "emojis-list": "^2.0.0",
-            "json5": "^0.5.0",
-            "object-assign": "^4.0.1"
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-        "source-map": {
-          "version": "0.1.43",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.1.43.tgz",
-          "integrity": "sha1-wkvBRspRfBRx9drL4lcbK3+eM0Y=",
+        "iconv-lite": {
+          "version": "0.6.3",
+          "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
+          "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
           "dev": true,
           "requires": {
-            "amdefine": ">=0.0.4"
+            "safer-buffer": ">= 2.1.2 < 3.0.0"
           }
         }
       }
@@ -6435,9 +6408,9 @@
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-          "version": "1.0.1",
-          "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.1.tgz",
-          "integrity": "sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==",
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.2.tgz",
+          "integrity": "sha512-g1MWMLBiz8FKi1e4w0UyVL3w+iJceWAFBAaBnnGKOpNa5f8TLktkbre1+s6oICydWAm+HRUGTmI+//xv2hvXYA==",
           "dev": true,
           "requires": {
             "minimist": "^1.2.0"
diff --git a/package.json b/package.json
index a2016d9..6de5ebd 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "eslint-plugin-standard": "^4.0.0",
     "flow-bin": "^0.52.0",
     "rimraf": "^2.6.1",
-    "source-map-loader": "^0.1.6",
+    "source-map-loader": "^4.0.1",
     "webpack": "^4.28.3",
     "webpack-cli": "^3.3.12"
   },