diff --git a/package-lock.json b/package-lock.json
index 8df1f9d..841260b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@pdffiller/karma-coverage-istanbul-reporter",
-  "version": "1.3.4",
+  "version": "1.3.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -188,7 +188,7 @@
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       "integrity": "sha1-126/jKlNJ24keja61EpLdKthGZE=",
       "requires": {
-        "default-require-extensions": "1.0.0"
+        "default-require-extensions": "^1.0.0"
       }
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     "argparse": {
@@ -1664,7 +1664,7 @@
       "resolved": "https://registry.npmjs.org/default-require-extensions/-/default-require-extensions-1.0.0.tgz",
       "integrity": "sha1-836hXT4T/9m0N9M+GnW1+5eHTLg=",
       "requires": {
-        "strip-bom": "2.0.0"
+        "strip-bom": "^2.0.0"
       }
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     "del": {
@@ -2706,8 +2706,8 @@
       "resolved": "https://registry.npmjs.org/fileset/-/fileset-2.0.3.tgz",
       "integrity": "sha1-jnVIqW08wjJ+5eZ0FocjozO7oqA=",
       "requires": {
-        "glob": "7.1.2",
-        "minimatch": "3.0.4"
+        "glob": "^7.0.3",
+        "minimatch": "^3.0.3"
       }
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@@ -2911,7 +2911,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -2962,7 +2963,8 @@
         "balanced-match": {
           "version": "0.4.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -2977,6 +2979,7 @@
           "version": "0.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "inherits": "2.0.3"
           }
@@ -2985,6 +2988,7 @@
           "version": "2.10.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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           }
@@ -2993,6 +2997,7 @@
           "version": "1.1.7",
           "bundled": true,
           "dev": true,
+          "optional": true,
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             "concat-map": "0.0.1"
@@ -3001,7 +3006,8 @@
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           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3018,12 +3024,14 @@
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           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "combined-stream": {
           "version": "1.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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           }
@@ -3031,17 +3039,20 @@
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           "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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         "core-util-is": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3087,7 +3098,8 @@
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           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3113,7 +3125,8 @@
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           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3135,12 +3148,14 @@
         "fs.realpath": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "fstream": {
           "version": "1.0.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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             "inherits": "2.0.3",
@@ -3196,6 +3211,7 @@
           "version": "7.1.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "fs.realpath": "1.0.0",
             "inflight": "1.0.6",
@@ -3208,7 +3224,8 @@
         "graceful-fs": {
           "version": "4.1.11",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "har-schema": {
           "version": "1.0.5",
@@ -3247,7 +3264,8 @@
         "hoek": {
           "version": "2.16.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "http-signature": {
           "version": "1.1.1",
@@ -3264,6 +3282,7 @@
           "version": "1.0.6",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "once": "1.4.0",
             "wrappy": "1.0.2"
@@ -3272,7 +3291,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "ini": {
           "version": "1.3.4",
@@ -3284,6 +3304,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -3297,7 +3318,8 @@
         "isarray": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3370,12 +3392,14 @@
         "mime-db": {
           "version": "1.27.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mime-types": {
           "version": "2.1.15",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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           }
@@ -3384,6 +3408,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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           }
@@ -3391,12 +3416,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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           }
@@ -3449,7 +3476,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "oauth-sign": {
           "version": "0.8.2",
@@ -3467,6 +3495,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1.0.2"
           }
@@ -3496,7 +3525,8 @@
         "path-is-absolute": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "performance-now": {
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@@ -3507,7 +3537,8 @@
         "process-nextick-args": {
           "version": "1.0.7",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "punycode": {
           "version": "1.4.1",
@@ -3545,6 +3576,7 @@
           "version": "2.2.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -3589,6 +3621,7 @@
           "version": "2.6.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "glob": "7.1.2"
           }
@@ -3596,7 +3629,8 @@
         "safe-buffer": {
           "version": "5.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "semver": {
           "version": "5.3.0",
@@ -3654,6 +3688,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -3664,6 +3699,7 @@
           "version": "1.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "5.0.1"
           }
@@ -3678,6 +3714,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "2.1.1"
           }
@@ -3692,6 +3729,7 @@
           "version": "2.2.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "block-stream": "0.0.9",
             "fstream": "1.0.11",
@@ -3747,7 +3785,8 @@
         "util-deprecate": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "uuid": {
           "version": "3.0.1",
@@ -3776,7 +3815,8 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
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@@ -4683,21 +4723,42 @@
       "dev": true
     },
     "istanbul-api": {
-      "version": "1.1.14",
-      "resolved": "https://registry.npmjs.org/istanbul-api/-/istanbul-api-1.1.14.tgz",
-      "integrity": "sha1-JbxXAffGgMD//5E95G42GaOm5oA=",
-      "requires": {
-        "async": "2.5.0",
-        "fileset": "2.0.3",
-        "istanbul-lib-coverage": "1.1.1",
-        "istanbul-lib-hook": "1.0.7",
-        "istanbul-lib-instrument": "1.8.0",
-        "istanbul-lib-report": "1.1.1",
-        "istanbul-lib-source-maps": "1.2.1",
-        "istanbul-reports": "1.1.2",
-        "js-yaml": "3.10.0",
-        "mkdirp": "0.5.1",
-        "once": "1.4.0"
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/istanbul-api/-/istanbul-api-1.3.7.tgz",
+      "integrity": "sha512-4/ApBnMVeEPG3EkSzcw25wDe4N66wxwn+KKn6b47vyek8Xb3NBAcg4xfuQbS7BqcZuTX4wxfD5lVagdggR3gyA==",
+      "requires": {
+        "async": "^2.1.4",
+        "fileset": "^2.0.2",
+        "istanbul-lib-coverage": "^1.2.1",
+        "istanbul-lib-hook": "^1.2.2",
+        "istanbul-lib-instrument": "^1.10.2",
+        "istanbul-lib-report": "^1.1.5",
+        "istanbul-lib-source-maps": "^1.2.6",
+        "istanbul-reports": "^1.5.1",
+        "js-yaml": "^3.7.0",
+        "mkdirp": "^0.5.1",
+        "once": "^1.4.0"
+      },
+      "dependencies": {
+        "istanbul-lib-coverage": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-1.2.1.tgz",
+          "integrity": "sha512-PzITeunAgyGbtY1ibVIUiV679EFChHjoMNRibEIobvmrCRaIgwLxNucOSimtNWUhEib/oO7QY2imD75JVgCJWQ=="
+        },
+        "istanbul-lib-instrument": {
+          "version": "1.10.2",
+          "resolved": "https://registry.npmjs.org/istanbul-lib-instrument/-/istanbul-lib-instrument-1.10.2.tgz",
+          "integrity": "sha512-aWHxfxDqvh/ZlxR8BBaEPVSWDPUkGD63VjGQn3jcw8jCp7sHEMKcrj4xfJn/ABzdMEHiQNyvDQhqm5o8+SQg7A==",
+          "requires": {
+            "babel-generator": "^6.18.0",
+            "babel-template": "^6.16.0",
+            "babel-traverse": "^6.18.0",
+            "babel-types": "^6.18.0",
+            "babylon": "^6.18.0",
+            "istanbul-lib-coverage": "^1.2.1",
+            "semver": "^5.3.0"
+          }
+        }
       }
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     "istanbul-instrumenter-loader": {
@@ -4715,20 +4776,22 @@
     "istanbul-lib-coverage": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-1.1.1.tgz",
-      "integrity": "sha512-0+1vDkmzxqJIn5rcoEqapSB4DmPxE31EtI2dF2aCkV5esN9EWHxZ0dwgDClivMXJqE7zaYQxq30hj5L0nlTN5Q=="
+      "integrity": "sha512-0+1vDkmzxqJIn5rcoEqapSB4DmPxE31EtI2dF2aCkV5esN9EWHxZ0dwgDClivMXJqE7zaYQxq30hj5L0nlTN5Q==",
+      "dev": true
     },
     "istanbul-lib-hook": {
-      "version": "1.0.7",
-      "resolved": "https://registry.npmjs.org/istanbul-lib-hook/-/istanbul-lib-hook-1.0.7.tgz",
-      "integrity": "sha512-3U2HB9y1ZV9UmFlE12Fx+nPtFqIymzrqCksrXujm3NVbAZIJg/RfYgO1XiIa0mbmxTjWpVEVlkIZJ25xVIAfkQ==",
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-hook/-/istanbul-lib-hook-1.2.2.tgz",
+      "integrity": "sha512-/Jmq7Y1VeHnZEQ3TL10VHyb564mn6VrQXHchON9Jf/AEcmQ3ZIiyD1BVzNOKTZf/G3gE+kiGK6SmpF9y3qGPLw==",
       "requires": {
-        "append-transform": "0.4.0"
+        "append-transform": "^0.4.0"
       }
     },
     "istanbul-lib-instrument": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/istanbul-lib-instrument/-/istanbul-lib-instrument-1.8.0.tgz",
       "integrity": "sha1-ZvbJQhzJ7EcE928tsIS6kHiitTI=",
+      "dev": true,
       "requires": {
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         "babel-template": "6.26.0",
@@ -4740,44 +4803,69 @@
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-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-1.1.1.tgz",
-      "integrity": "sha512-tvF+YmCmH4thnez6JFX06ujIA19WPa9YUiwjc1uALF2cv5dmE3It8b5I8Ob7FHJ70H9Y5yF+TDkVa/mcADuw1Q==",
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-1.1.5.tgz",
+      "integrity": "sha512-UsYfRMoi6QO/doUshYNqcKJqVmFe9w51GZz8BS3WB0lYxAllQYklka2wP9+dGZeHYaWIdcXUx8JGdbqaoXRXzw==",
       "requires": {
-        "istanbul-lib-coverage": "1.1.1",
-        "mkdirp": "0.5.1",
-        "path-parse": "1.0.5",
-        "supports-color": "3.2.3"
+        "istanbul-lib-coverage": "^1.2.1",
+        "mkdirp": "^0.5.1",
+        "path-parse": "^1.0.5",
+        "supports-color": "^3.1.2"
       },
       "dependencies": {
+        "istanbul-lib-coverage": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-1.2.1.tgz",
+          "integrity": "sha512-PzITeunAgyGbtY1ibVIUiV679EFChHjoMNRibEIobvmrCRaIgwLxNucOSimtNWUhEib/oO7QY2imD75JVgCJWQ=="
+        },
         "supports-color": {
           "version": "3.2.3",
           "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-3.2.3.tgz",
           "integrity": "sha1-ZawFBLOVQXHYpklGsq48u4pfVPY=",
           "requires": {
-            "has-flag": "1.0.0"
+            "has-flag": "^1.0.0"
           }
         }
       }
     },
     "istanbul-lib-source-maps": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/istanbul-lib-source-maps/-/istanbul-lib-source-maps-1.2.1.tgz",
-      "integrity": "sha512-mukVvSXCn9JQvdJl8wP/iPhqig0MRtuWuD4ZNKo6vB2Ik//AmhAKe3QnPN02dmkRe3lTudFk3rzoHhwU4hb94w==",
-      "requires": {
-        "debug": "2.6.9",
-        "istanbul-lib-coverage": "1.1.1",
-        "mkdirp": "0.5.1",
-        "rimraf": "2.6.2",
-        "source-map": "0.5.7"
+      "version": "1.2.6",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-source-maps/-/istanbul-lib-source-maps-1.2.6.tgz",
+      "integrity": "sha512-TtbsY5GIHgbMsMiRw35YBHGpZ1DVFEO19vxxeiDMYaeOFOCzfnYVxvl6pOUIZR4dtPhAGpSMup8OyF8ubsaqEg==",
+      "requires": {
+        "debug": "^3.1.0",
+        "istanbul-lib-coverage": "^1.2.1",
+        "mkdirp": "^0.5.1",
+        "rimraf": "^2.6.1",
+        "source-map": "^0.5.3"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "3.2.7",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.7.tgz",
+          "integrity": "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==",
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "istanbul-lib-coverage": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-1.2.1.tgz",
+          "integrity": "sha512-PzITeunAgyGbtY1ibVIUiV679EFChHjoMNRibEIobvmrCRaIgwLxNucOSimtNWUhEib/oO7QY2imD75JVgCJWQ=="
+        },
+        "ms": {
+          "version": "2.1.3",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+          "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
+        }
       }
     },
     "istanbul-reports": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-1.1.2.tgz",
-      "integrity": "sha1-D7Lj9qqZIr085F0F2KtNXo4HvU8=",
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-1.5.1.tgz",
+      "integrity": "sha512-+cfoZ0UXzWjhAdzosCPP3AN8vvef8XDkWtTfgaN+7L3YTpNYITnCaEkceo5SEYy644VkHka/P1FvkWvrG/rrJw==",
       "requires": {
-        "handlebars": "4.0.10"
+        "handlebars": "^4.0.3"
       }
     },
     "js-tokens": {
@@ -5800,6 +5888,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "3.2.0",
             "longest": "1.0.1",
@@ -6549,7 +6638,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
           "version": "1.3.1",
diff --git a/package.json b/package.json
index 89650a5..d086bc5 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
   },
   "homepage": "https://github.com/mattlewis92/karma-coverage-istanbul-reporter#readme",
   "dependencies": {
-    "istanbul-api": "^1.1.8",
+    "istanbul-api": "^1.3.7",
     "minimatch": "^3.0.4"
   },
   "devDependencies": {