diff --git a/package-lock.json b/package-lock.json
index 0d992f9..33d0e86 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,9 +1,29 @@
 {
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+  "version": "5.0.0",
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+      "requires": {
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+      }
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+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.0.0.tgz",
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@@ -21,72 +41,56 @@
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-      "dev": true,
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-      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.2.0.tgz",
-      "integrity": "sha1-6GuBnGAs+IIa1jdBNpjx3sAhhHo=",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.1.tgz",
+      "integrity": "sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==",
       "dev": true
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-      "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
+    "ajv": {
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+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.6.2.tgz",
+      "integrity": "sha512-FBHEW6Jf5TB9MGBgUUA9XHkTbjXYfAUjY43ACMfmdMRHniyoMHjHjzD50OK8LGDWQwp4rWEsIq5kEqq7rvIM1g==",
       "dev": true,
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-        "longest": "^1.0.1",
-        "repeat-string": "^1.5.2"
+        "fast-deep-equal": "^2.0.1",
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       "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
-      "dev": true
+      "dev": true,
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-      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.1.0.tgz",
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-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
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-      "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-      "dev": true
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
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+      "dev": true,
+      "requires": {
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+      }
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@@ -105,31 +109,10 @@
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+      "resolved": "http://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
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-      "dev": true,
-      "requires": {
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-    "array-uniq": {
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@@ -145,9 +128,15 @@
       "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
       "dev": true
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+    "astral-regex": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-1.0.0.tgz",
+      "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==",
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+    },
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-      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+      "resolved": "http://registry.npmjs.org/async/-/async-1.5.2.tgz",
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@@ -169,41 +158,6 @@
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@@ -215,32 +169,26 @@
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-      "integrity": "sha1-h2eKGdhLR9hZuDGZvVm84iKxBFQ=",
+      "version": "1.18.3",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
+      "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
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         "debug": "2.6.9",
-        "depd": "~1.1.1",
-        "http-errors": "~1.6.2",
-        "iconv-lite": "0.4.19",
+        "depd": "~1.1.2",
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         "on-finished": "~2.3.0",
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+        "qs": "6.5.2",
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@@ -253,15 +201,18 @@
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@@ -303,34 +254,16 @@
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-      "resolved": "https://registry.npmjs.org/callsites/-/callsites-0.2.0.tgz",
+      "resolved": "http://registry.npmjs.org/callsites/-/callsites-0.2.0.tgz",
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@@ -340,32 +273,12 @@
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-      "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=",
+      "version": "0.7.0",
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@@ -389,27 +302,6 @@
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@@ -417,35 +309,42 @@
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+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.17.1.tgz",
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-      "resolved": "https://registry.npmjs.org/tdigest/-/tdigest-0.1.1.tgz",
-      "integrity": "sha1-Ljyyw56kSeVdHmzZEReszKRYgCE=",
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+      "resolved": "https://registry.npmjs.org/table/-/table-5.1.1.tgz",
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+        "ajv": "^6.6.1",
+        "lodash": "^4.17.11",
+        "slice-ansi": "2.0.0",
+        "string-width": "^2.1.1"
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@@ -2453,7 +2185,7 @@
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+      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
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@@ -2466,6 +2198,12 @@
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       }
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+    "toidentifier": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
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+      "dev": true
+    },
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@@ -2474,8 +2212,22 @@
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+        "punycode": {
+          "version": "1.4.1",
+          "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.4.1.tgz",
+          "integrity": "sha1-wNWmOycYgArY4esPpSachN1BhF4=",
+          "dev": true
+        }
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+    "tslib": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
+      "integrity": "sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ==",
+      "dev": true
+    },
     "tunnel-agent": {
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       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -2489,8 +2241,7 @@
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-      "dev": true,
-      "optional": true
+      "dev": true
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@@ -2512,33 +2263,25 @@
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-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.8.29.tgz",
-      "integrity": "sha1-KcVzMUgFe7Th913zW3qcty5qWd0=",
+      "version": "3.4.9",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.4.9.tgz",
+      "integrity": "sha512-8CJsbKOtEbnJsTyv6LE6m6ZKniqMiFWmm9sRbopbkGs3gMPPfd3Fh8iIA4Ykv5MgaTbqHr4BaoGLJLZNhsrW1Q==",
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-        "source-map": "~0.5.1",
-        "uglify-to-browserify": "~1.0.0",
-        "yargs": "~3.10.0"
+        "commander": "~2.17.1",
+        "source-map": "~0.6.1"
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-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
-          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "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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-      "resolved": "https://registry.npmjs.org/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz",
-      "integrity": "sha1-bgkk1r2mta/jSeOabWMoUKD4grc=",
-      "dev": true,
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@@ -2552,14 +2295,6 @@
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-          "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
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-          "dev": true
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@@ -2611,13 +2346,6 @@
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@@ -2645,19 +2373,6 @@
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-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
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diff --git a/package.json b/package.json
index d5a3eab..74e61fe 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "express-prom-bundle",
-  "version": "4.3.0",
+  "version": "5.0.0",
   "description": "express middleware with popular prometheus metrics in one bundle",
   "main": "src/index.js",
   "keywords": [
@@ -18,20 +18,22 @@
   "license": "MIT",
   "dependencies": {
     "on-finished": "^2.3.0",
-    "prom-client": "~11.2.1",
     "url-value-parser": "^2.0.0"
   },
   "devDependencies": {
     "coveralls": "^3.0.2",
-    "eslint": "^5.3.0",
-    "express": "^4.16.3",
+    "eslint": "^5.11.0",
+    "express": "^4.16.4",
     "istanbul": "^0.4.5",
-    "jasme": "^5.2.0",
-    "koa": "^2.5.2",
-    "koa-connect": "^2.0.0",
-    "supertest": "^3.0.0",
+    "jasme": "^6.0.0",
+    "koa": "^2.6.2",
+    "koa-connect": "^2.0.1",
+    "supertest": "^3.3.0",
     "supertest-koa-agent": "^0.3.0"
   },
+  "peerDependencies": {
+    "prom-client": "^11.1.2"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/jochen-schweizer/express-prom-bundle.git"