diff --git a/lib/source-maps.js b/lib/source-maps.js
index be02a46e8..1de8bd6ea 100644
--- a/lib/source-maps.js
+++ b/lib/source-maps.js
@@ -49,7 +49,7 @@ class SourceMaps {
     const transformed = await this._sourceMapCache.transformCoverage(
       libCoverage.createCoverageMap(obj)
     )
-    return transformed.map.data
+    return transformed.data
   }
 
   async reloadCachedSourceMaps (report) {
diff --git a/package-lock.json b/package-lock.json
index 10122031e..37c0d77de 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,14 +13,14 @@
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     },
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-      "version": "7.6.2",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.6.2.tgz",
-      "integrity": "sha512-j8iHaIW4gGPnViaIHI7e9t/Hl8qLjERI6DcV9kEpAIDJsAOrcnXqRS7t+QbhL76pwbtqP+QCQLL0z1CyVmtjjQ==",
+      "version": "7.6.3",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.6.3.tgz",
+      "integrity": "sha512-hLhYbAb3pHwxjlijC4AQ7mqZdcoujiNaW7izCT04CIowHK8psN0IN8QjDv0iyFtycF5FowUOTwDloIheI25aMw==",
       "requires": {
-        "@babel/types": "^7.6.0",
+        "@babel/types": "^7.6.3",
         "jsesc": "^2.5.1",
         "lodash": "^4.17.13",
-        "source-map": "^0.5.0"
+        "source-map": "^0.6.1"
       }
     },
     "@babel/helper-function-name": {
@@ -60,14 +60,14 @@
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     },
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-      "version": "7.6.2",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.6.2.tgz",
-      "integrity": "sha512-mdFqWrSPCmikBoaBYMuBulzTIKuXVPtEISFbRRVNwMWpCms/hmE2kRq0bblUHaNRKrjRlmVbx1sDHmjmRgD2Xg=="
+      "version": "7.6.3",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.6.3.tgz",
+      "integrity": "sha512-sUZdXlva1dt2Vw2RqbMkmfoImubO0D0gaCrNngV6Hi0DA4x3o4mlrq0tbfY0dZEUIccH8I6wQ4qgEtwcpOR6Qg=="
     },
     "@babel/runtime": {
-      "version": "7.6.2",
-      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.6.2.tgz",
-      "integrity": "sha512-EXxN64agfUqqIGeEjI5dL5z0Sw0ZwWo1mLTi4mQowCZ42O59b7DRpZAnTC6OqdF28wMBMFKNb/4uFGrVaigSpg==",
+      "version": "7.6.3",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.6.3.tgz",
+      "integrity": "sha512-kq6anf9JGjW8Nt5rYfEuGRaEAaH1mkv3Bbu6rYvLOpPh/RusSJXuKPEAoZ7L7gybZkchE8+NV5g9vKF4AGAtsA==",
       "dev": true,
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@@ -84,25 +84,25 @@
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     "@babel/traverse": {
-      "version": "7.6.2",
-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.6.2.tgz",
-      "integrity": "sha512-8fRE76xNwNttVEF2TwxJDGBLWthUkHWSldmfuBzVRmEDWOtu4XdINTgN7TDWzuLg4bbeIMLvfMFD9we5YcWkRQ==",
+      "version": "7.6.3",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.6.3.tgz",
+      "integrity": "sha512-unn7P4LGsijIxaAJo/wpoU11zN+2IaClkQAxcJWBNCMS6cmVh802IyLHNkAjQ0iYnRS3nnxk5O3fuXW28IMxTw==",
       "requires": {
         "@babel/code-frame": "^7.5.5",
-        "@babel/generator": "^7.6.2",
+        "@babel/generator": "^7.6.3",
         "@babel/helper-function-name": "^7.1.0",
         "@babel/helper-split-export-declaration": "^7.4.4",
-        "@babel/parser": "^7.6.2",
-        "@babel/types": "^7.6.0",
+        "@babel/parser": "^7.6.3",
+        "@babel/types": "^7.6.3",
         "debug": "^4.1.0",
         "globals": "^11.1.0",
         "lodash": "^4.17.13"
       }
     },
     "@babel/types": {
-      "version": "7.6.1",
-      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.6.1.tgz",
-      "integrity": "sha512-X7gdiuaCmA0uRjCmRtYJNAVCc/q+5xSgsfKJHqMN4iNLILX39677fJE1O40arPMh0TTtS9ItH67yre6c7k6t0g==",
+      "version": "7.6.3",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.6.3.tgz",
+      "integrity": "sha512-CqbcpTxMcpuQTMhjI37ZHVgjBkysg5icREQIEZ0eG1yCNwg3oy+5AaLiOKmjsCj6nqOsa6Hf0ObjRVwokb7srA==",
       "requires": {
         "esutils": "^2.0.2",
         "lodash": "^4.17.13",
@@ -110,9 +110,9 @@
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-      "version": "1.0.0-alpha.0",
-      "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.0.0-alpha.0.tgz",
-      "integrity": "sha512-tDRosscSl5tXCN2rYsfRddj/sl8ApLm30ByOhGFpMtCzjVbunPTwwexHFjxcPycSN6pUunUhOW+AcTfb9MB+gA==",
+      "version": "1.0.0-alpha.1",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.0.0-alpha.1.tgz",
+      "integrity": "sha512-ztOcmioPc9meI3VRTHFU73bha0xwBr55X2na1+hRZfvtmVWXBknnSm6SI16UOXUrwIzpSMkEmEXsS7FG/gu8ZQ==",
       "requires": {
         "camelcase": "^5.3.1",
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@@ -586,9 +586,9 @@
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     "commander": {
-      "version": "2.20.1",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.1.tgz",
-      "integrity": "sha512-cCuLsMhJeWQ/ZpsFTbE765kvVfoeSddc4nU3up4fV+fDBcfUXnbITJ+JzhkdjzOqhURjZgujxaioam4RM9yGUg==",
+      "version": "2.20.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz",
+      "integrity": "sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==",
       "optional": true
     },
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@@ -997,23 +997,13 @@
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-      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.0.tgz",
-      "integrity": "sha512-6U/8SMK2FBNnB21oQ4+6Nsodxanw1gTkntYA2zBdkFYFu3ZDx65P2ONEXGSvob/QS6REjVHQ9zxzdOafwFdstw==",
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.1.tgz",
+      "integrity": "sha512-u7v4o84SwFpD32Z8IIcPZ6z1/ie24O6RU3RbtL5Y316l3KuHVPx9ItBgWQ6VlfAFnRnTtMUrsQ9MUUTuEZjogg==",
       "requires": {
         "path-key": "^3.1.0",
-        "shebang-command": "^1.2.0",
-        "which": "^1.2.9"
-      },
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-          "version": "1.3.1",
-          "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
-          "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
-          "requires": {
-            "isexe": "^2.0.0"
-          }
-        }
+        "shebang-command": "^2.0.0",
+        "which": "^2.0.1"
       }
     },
     "currently-unhandled": {
@@ -1368,6 +1358,21 @@
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           "dev": true
         },
+        "shebang-command": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
+          "integrity": "sha1-RKrGW2lbAzmJaMOfNj/uXer98eo=",
+          "dev": true,
+          "requires": {
+            "shebang-regex": "^1.0.0"
+          }
+        },
+        "shebang-regex": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-1.0.0.tgz",
+          "integrity": "sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=",
+          "dev": true
+        },
         "strip-ansi": {
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           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
@@ -2252,21 +2257,14 @@
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-      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.4.2.tgz",
-      "integrity": "sha512-cIv17+GhL8pHHnRJzGu2wwcthL5sb8uDKBHvZ2Dtu5s1YNt0ljbzKbamnc+gr69y7bzwQiBdr5+hOpRd5pnOdg==",
+      "version": "4.4.3",
+      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.4.3.tgz",
+      "integrity": "sha512-B0W4A2U1ww3q7VVthTKfh+epHx+q4mCt6iK+zEAzbMBpWQAwxCeKxEGpj/1oQTpzPXDNSOG7hmG14TsISH50yw==",
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         "optimist": "^0.6.1",
         "source-map": "^0.6.1",
         "uglify-js": "^3.1.4"
-      },
-      "dependencies": {
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-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
-        }
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     },
     "har-schema": {
@@ -2332,9 +2330,9 @@
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-      "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.8.4.tgz",
-      "integrity": "sha512-pzXIvANXEFrc5oFFXRMkbLPQ2rXRoDERwDLyrcUxGhaZhgP54BBSl9Oheh7Vv0T090cszWBxPjkQQ5Sq1PbBRQ==",
+      "version": "2.8.5",
+      "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.8.5.tgz",
+      "integrity": "sha512-kssjab8CvdXfcXMXVcvsXum4Hwdq9XGtRD3TteMEvEbq0LXyiNQr6AprqKqfeaDXze7SxWvRxdpwE6ku7ikLkg==",
       "dev": true
     },
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@@ -2621,9 +2619,9 @@
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     "istanbul-lib-processinfo": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/istanbul-lib-processinfo/-/istanbul-lib-processinfo-2.0.1.tgz",
-      "integrity": "sha512-4phn1Da5BCA8bPceeVJbJ6k2sJC0cJm3MAII4sPxl+qiMwPLhSgf2yZZt7ZKOJb/DGvLli2nHGiW9W7aND7cMQ==",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-processinfo/-/istanbul-lib-processinfo-2.0.2.tgz",
+      "integrity": "sha512-kOwpa7z9hme+IBPZMzQ5vdQj8srYgAtaRqeI48NGmAQ+/5yKiHLV0QbYqQpxsdEF0+w14SoB8YbnHKcXE2KnYw==",
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@@ -2660,20 +2658,13 @@
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     "istanbul-lib-source-maps": {
-      "version": "4.0.0-alpha.1",
-      "resolved": "https://registry.npmjs.org/istanbul-lib-source-maps/-/istanbul-lib-source-maps-4.0.0-alpha.1.tgz",
-      "integrity": "sha512-MSc2eM/ecOs7ojRNkMFB1Nj0DnapAXhcXD7fyjV55qQShgpysezVQuTFnzawHP6dJMNiYzwjymsBsTWbra0SjQ==",
+      "version": "4.0.0-alpha.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-source-maps/-/istanbul-lib-source-maps-4.0.0-alpha.2.tgz",
+      "integrity": "sha512-taJF9b9Ddd2rQeajwCdQ+byO5li7MBFnebTo7BIIUSS4dVZHafHP5bVh5wPQ92FAjom9Rn0q3ymd3LykmAjYrQ==",
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         "istanbul-lib-coverage": "^3.0.0-alpha.1",
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@@ -3145,13 +3136,6 @@
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-        }
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     "mime-db": {
@@ -3278,9 +3262,9 @@
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-      "resolved": "https://registry.npmjs.org/node-preload/-/node-preload-0.1.2.tgz",
-      "integrity": "sha512-OIVpCWTqvPClyXxt9HtKbHDKqQQzqzQIcv6FJgXGcgrQQiYPXNL38vDp1RbRwsF7HVDGWc7yQa5DNu2Zbs9MVw=="
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/node-preload/-/node-preload-0.1.3.tgz",
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@@ -3673,12 +3657,6 @@
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-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
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@@ -4511,17 +4489,17 @@
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-      "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
-      "integrity": "sha1-RKrGW2lbAzmJaMOfNj/uXer98eo=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
+      "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
       "requires": {
-        "shebang-regex": "^1.0.0"
+        "shebang-regex": "^3.0.0"
       }
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     "shebang-regex": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-1.0.0.tgz",
-      "integrity": "sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM="
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
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@@ -4538,9 +4516,9 @@
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-      "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w="
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
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@@ -4550,14 +4528,6 @@
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@@ -5932,6 +5902,21 @@
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+        "shebang-command": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
+          "integrity": "sha1-RKrGW2lbAzmJaMOfNj/uXer98eo=",
+          "dev": true,
+          "requires": {
+            "shebang-regex": "^1.0.0"
+          }
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+        "shebang-regex": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-1.0.0.tgz",
+          "integrity": "sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=",
+          "dev": true
+        },
         "signal-exit": {
           "version": "3.0.2",
           "bundled": true,
@@ -6379,21 +6364,13 @@
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-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.0.tgz",
-      "integrity": "sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==",
+      "version": "3.6.1",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.1.tgz",
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       "optional": true,
       "requires": {
-        "commander": "~2.20.0",
+        "commander": "2.20.0",
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     },
     "unicode-length": {
@@ -6553,9 +6530,9 @@
       "dev": true
     },
     "yaml": {
-      "version": "1.7.0",
-      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.7.0.tgz",
-      "integrity": "sha512-BEXCJKbbJmDzjuG4At0R4nHJKlP81hxoLQqUCaxzqZ8HHgjAlOXbiOHVCQ4YuQqO/rLR8HoQ6kxGkYJ3tlKIsg==",
+      "version": "1.7.1",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.7.1.tgz",
+      "integrity": "sha512-sR0mJ2C3LVBgMST+0zrrrsKSijbw64bfHmTt4nEXLZTZFyIAuUVARqA/LO5kaZav2OVQMaZ+5WRrZv7QjxG3uQ==",
       "dev": true,
       "requires": {
         "@babel/runtime": "^7.5.5"
diff --git a/package.json b/package.json
index 9f46f5657..75d6344c4 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
   "author": "Ben Coe <ben@npmjs.com>",
   "license": "ISC",
   "dependencies": {
-    "@istanbuljs/load-nyc-config": "^1.0.0-alpha.0",
+    "@istanbuljs/load-nyc-config": "^1.0.0-alpha.1",
     "@istanbuljs/schema": "^0.1.1",
     "caching-transform": "^4.0.0",
     "convert-source-map": "^1.6.0",
@@ -68,15 +68,15 @@
     "istanbul-lib-coverage": "^3.0.0-alpha.1",
     "istanbul-lib-hook": "^3.0.0-alpha.1",
     "istanbul-lib-instrument": "^4.0.0-alpha.1",
-    "istanbul-lib-processinfo": "^2.0.1",
+    "istanbul-lib-processinfo": "^2.0.2",
     "istanbul-lib-report": "^3.0.0-alpha.1",
-    "istanbul-lib-source-maps": "^4.0.0-alpha.1",
+    "istanbul-lib-source-maps": "^4.0.0-alpha.2",
     "istanbul-reports": "^3.0.0-alpha.2",
     "js-yaml": "^3.13.1",
     "make-dir": "^3.0.0",
     "merge-source-map": "^1.1.0",
     "p-map": "^3.0.0",
-    "node-preload": "^0.1.2",
+    "node-preload": "^0.1.3",
     "resolve-from": "^5.0.0",
     "rimraf": "^3.0.0",
     "signal-exit": "^3.0.2",