diff --git a/package-lock.json b/package-lock.json
index e9914e4..be515fa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -523,6 +523,7 @@
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@@ -539,6 +540,12 @@
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@@ -603,6 +610,12 @@
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@@ -2179,6 +2186,25 @@
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+      "resolved": "https://registry.npmjs.org/clone-deep/-/clone-deep-4.0.1.tgz",
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@@ -4152,6 +4187,7 @@
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@@ -4173,12 +4210,14 @@
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@@ -4197,6 +4236,7 @@
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@@ -4277,7 +4317,8 @@
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@@ -4374,7 +4416,8 @@
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@@ -4410,6 +4453,7 @@
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@@ -4429,6 +4473,7 @@
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@@ -4472,12 +4517,14 @@
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-        "lodash": "^4.0.0",
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+          "requires": {
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+            "ajv-errors": "^1.0.0",
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+        }
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-      "dev": true
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       "integrity": "sha1-UaGp50SOy9Ms2lRCFnW7IbwJPaY=",
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@@ -6041,7 +6146,8 @@
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-      "dev": true
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       "integrity": "sha1-z1mU4v0mjQD1zw+nZ6CBae2wfsA=",
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@@ -9382,6 +9492,23 @@
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+      "resolved": "https://registry.npmjs.org/shallow-clone/-/shallow-clone-3.0.1.tgz",
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+      "dev": true,
+      "requires": {
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       "integrity": "sha1-1275EnyyPCJZ7bHoNJwujV4tdME=",
       "dev": true,
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@@ -10579,7 +10707,8 @@
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-      "dev": true
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@@ -10874,12 +11003,6 @@
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@@ -11263,7 +11386,8 @@
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+              "optional": true
             },
             "aproba": {
               "version": "1.2.0",
@@ -11284,12 +11408,14 @@
             "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"
@@ -11304,17 +11430,20 @@
             "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",
@@ -11431,7 +11560,8 @@
             "inherits": {
               "version": "2.0.3",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "ini": {
               "version": "1.3.5",
@@ -11443,6 +11573,7 @@
               "version": "1.0.0",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "number-is-nan": "^1.0.0"
               }
@@ -11457,6 +11588,7 @@
               "version": "3.0.4",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "brace-expansion": "^1.1.7"
               }
@@ -11464,12 +11596,14 @@
             "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"
@@ -11488,6 +11622,7 @@
               "version": "0.5.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "minimist": "0.0.8"
               }
@@ -11568,7 +11703,8 @@
             "number-is-nan": {
               "version": "1.0.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "object-assign": {
               "version": "4.1.1",
@@ -11580,6 +11716,7 @@
               "version": "1.4.0",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "wrappy": "1"
               }
@@ -11665,7 +11802,8 @@
             "safe-buffer": {
               "version": "5.1.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -11701,6 +11839,7 @@
               "version": "1.0.2",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "code-point-at": "^1.0.0",
                 "is-fullwidth-code-point": "^1.0.0",
@@ -11720,6 +11859,7 @@
               "version": "3.0.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "ansi-regex": "^2.0.0"
               }
@@ -11763,12 +11903,14 @@
             "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
             }
           }
         },
@@ -12350,25 +12492,44 @@
       }
     },
     "webpack-dev-middleware": {
-      "version": "2.0.6",
-      "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-2.0.6.tgz",
-      "integrity": "sha512-tj5LLD9r4tDuRIDa5Mu9lnY2qBBehAITv6A9irqXhw/HQquZgTx3BCd57zYbU2gMDnncA49ufK2qVQSbaKJwOw==",
+      "version": "3.7.0",
+      "resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.7.0.tgz",
+      "integrity": "sha512-qvDesR1QZRIAZHOE3iQ4CXLZZSQ1lAUsSpnQmlB1PBfoN/xdRjmge3Dok0W4IdaVLJOGJy3sGI4sZHwjRU0PCA==",
       "dev": true,
       "requires": {
-        "loud-rejection": "^1.6.0",
-        "memory-fs": "~0.4.1",
-        "mime": "^2.1.0",
-        "path-is-absolute": "^1.0.0",
-        "range-parser": "^1.0.3",
-        "url-join": "^2.0.2",
-        "webpack-log": "^1.0.1"
+        "memory-fs": "^0.4.1",
+        "mime": "^2.4.2",
+        "range-parser": "^1.2.1",
+        "webpack-log": "^2.0.0"
       },
       "dependencies": {
         "mime": {
-          "version": "2.3.1",
-          "resolved": "https://registry.npmjs.org/mime/-/mime-2.3.1.tgz",
-          "integrity": "sha512-OEUllcVoydBHGN1z84yfQDimn58pZNNNXgZlHXSboxMlFvgI6MXSWpWKpFRra7H1HxpVhHTkrghfRW49k6yjeg==",
+          "version": "2.4.3",
+          "resolved": "https://registry.npmjs.org/mime/-/mime-2.4.3.tgz",
+          "integrity": "sha512-QgrPRJfE+riq5TPZMcHZOtm8c6K/yYrMbKIoRfapfiGLxS8OTeIfRhUGW5LU7MlRa52KOAGCfUNruqLrIBvWZw==",
           "dev": true
+        },
+        "range-parser": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
+          "integrity": "sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==",
+          "dev": true
+        },
+        "uuid": {
+          "version": "3.3.2",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
+          "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
+          "dev": true
+        },
+        "webpack-log": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/webpack-log/-/webpack-log-2.0.0.tgz",
+          "integrity": "sha512-cX8G2vR/85UYG59FgkoMamwHUIkSSlV3bBMRsbxVXVUk2j6NleCKjQ/WE9eYg9WY4w25O9w8wKP4rzNZFmUcUg==",
+          "dev": true,
+          "requires": {
+            "ansi-colors": "^3.0.0",
+            "uuid": "^3.3.2"
+          }
         }
       }
     },
diff --git a/package.json b/package.json
index f690964..8e862bd 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "karma-chrome-launcher": "^2.2.0",
     "karma-mocha": "^1.3.0",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^3.0.0",
+    "karma-webpack": "^4.0.0",
     "mocha": "^5.0.0",
     "pouchdb-find": "^6.4.2",
     "pouchdb-memory": "^6.0.0",