diff --git a/.gitignore b/.gitignore
index 6c6a58b..aca1561 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@
 .vscode/
 .history/
 node_modules/
-dist/
\ No newline at end of file
+dist/
+yarn-error.log
\ No newline at end of file
diff --git a/.npmignore b/.npmignore
deleted file mode 100644
index c5bbcbb..0000000
--- a/.npmignore
+++ /dev/null
@@ -1,6 +0,0 @@
-src
-node_modules
-typings
-tsconfig.json
-typings.json
-tslint.json
\ No newline at end of file
diff --git a/package.json b/package.json
index 9be9f3a..79b318f 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "test": "jest --watchAll",
     "build": "tsc",
     "watch": "tsc -w",
-    "prepublishOnly": "build"
+    "prepublishOnly": "yarn build"
   },
   "repository": {
     "type": "git",
@@ -21,7 +21,10 @@
     "subscriptions"
   ],
   "author": "Tomas Alabes",
-  "license": "ISC",
+  "license": "MIT",
+  "files": [
+    "dist"
+  ],
   "bugs": {
     "url": "https://github.com/tomasAlabes/graphql-kafkajs-subscriptions/issues"
   },
@@ -32,7 +35,6 @@
     ],
     "moduleFileExtensions": [
       "ts",
-      "tsx",
       "js"
     ],
     "transform": {
@@ -42,14 +44,18 @@
   },
   "dependencies": {
     "graphql-subscriptions": "^1.1.0",
-    "kafkajs": "^1.11.0",
     "iterall": "^1.2.2"
   },
   "devDependencies": {
     "@types/jest": "^24.0.23",
     "@types/node": "^12.12.14",
     "jest": "^24.9.0",
+    "kafkajs": "^1.11.0",
     "ts-jest": "^24.2.0",
+    "tslint": "5.20.1",
     "typescript": "^3.7.3"
+  },
+  "peerDependencies": {
+    "kafkajs": "^1.11.0"
   }
-}
+}
\ No newline at end of file
diff --git a/src/test/InMemoryKafka.ts b/src/test/InMemoryKafka.ts
index 1bc349e..301c1b7 100644
--- a/src/test/InMemoryKafka.ts
+++ b/src/test/InMemoryKafka.ts
@@ -1,4 +1,3 @@
-// tslint:disable
 // copied from: https://github.com/Wei-Zou/jest-mock-kafkajs/blob/master/__mocks__/kafkajs.js
 
 export class Producer {
diff --git a/yarn.lock b/yarn.lock
index 3c2405f..578bd3e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -436,6 +436,13 @@ anymatch@^2.0.0:
     micromatch "^3.1.4"
     normalize-path "^2.1.1"
 
+argparse@^1.0.7:
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/argparse/-/argparse-1.0.10.tgz#bcd6791ea5ae09725e17e5ad988134cd40b3d911"
+  integrity sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==
+  dependencies:
+    sprintf-js "~1.0.2"
+
 arr-diff@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-4.0.0.tgz#d6461074febfec71e7e15235761a329a5dc7c520"
@@ -633,6 +640,11 @@ buffer-from@1.x, buffer-from@^1.0.0:
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
   integrity sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==
 
+builtin-modules@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-1.1.1.tgz#270f076c5a72c02f5b65a47df94c5fe3a278892f"
+  integrity sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8=
+
 cache-base@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/cache-base/-/cache-base-1.0.1.tgz#0a7f46416831c8b662ee36fe4e7c59d76f666ab2"
@@ -675,7 +687,7 @@ caseless@~0.12.0:
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
   integrity sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=
 
-chalk@^2.0.0, chalk@^2.0.1, chalk@^2.4.2:
+chalk@^2.0.0, chalk@^2.0.1, chalk@^2.3.0, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -740,7 +752,7 @@ combined-stream@^1.0.6, combined-stream@~1.0.6:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@~2.20.3:
+commander@^2.12.1, commander@~2.20.3:
   version "2.20.3"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
   integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
@@ -884,6 +896,11 @@ diff-sequences@^24.9.0:
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-24.9.0.tgz#5715d6244e2aa65f48bba0bc972db0b0b11e95b5"
   integrity sha512-Dj6Wk3tWyTE+Fo1rW8v0Xhwk80um6yFYKbuAxc9c3EZxIHFDYwbi34Uk42u1CdnIiVorvt4RmlSDjIPyzGC2ew==
 
+diff@^4.0.1:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.2.tgz#60f3aecb89d5fae520c11aa19efc2bb982aade7d"
+  integrity sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==
+
 domexception@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/domexception/-/domexception-1.0.1.tgz#937442644ca6a31261ef36e3ec677fe805582c90"
@@ -966,6 +983,11 @@ esprima@^3.1.3:
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
   integrity sha1-/cpRzuYTOJXjyI1TXOSdv/YqRjM=
 
+esprima@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
+  integrity sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==
+
 estraverse@^4.2.0:
   version "4.3.0"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.3.0.tgz#398ad3f3c5a24948be7725e83d11a7de28cdbd1d"
@@ -1926,6 +1948,14 @@ jest@^24.9.0:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
   integrity sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==
 
+js-yaml@^3.13.1:
+  version "3.13.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.13.1.tgz#aff151b30bfdfa8e49e05da22e7415e9dfa37847"
+  integrity sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==
+  dependencies:
+    argparse "^1.0.7"
+    esprima "^4.0.0"
+
 jsbn@~0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
@@ -2752,7 +2782,7 @@ sax@^1.2.4:
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
   integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
 
-"semver@2 || 3 || 4 || 5", semver@^5.4.1, semver@^5.5, semver@^5.5.0, semver@^5.6.0:
+"semver@2 || 3 || 4 || 5", semver@^5.3.0, semver@^5.4.1, semver@^5.5, semver@^5.5.0, semver@^5.6.0:
   version "5.7.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
   integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
@@ -2906,6 +2936,11 @@ split-string@^3.0.1, split-string@^3.0.2:
   dependencies:
     extend-shallow "^3.0.0"
 
+sprintf-js@~1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
+  integrity sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=
+
 sshpk@^1.7.0:
   version "1.16.1"
   resolved "https://registry.yarnpkg.com/sshpk/-/sshpk-1.16.1.tgz#fb661c0bef29b39db40769ee39fa70093d6f6877"
@@ -3104,6 +3139,37 @@ ts-jest@^24.2.0:
     semver "^5.5"
     yargs-parser "10.x"
 
+tslib@^1.8.0, tslib@^1.8.1:
+  version "1.10.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.10.0.tgz#c3c19f95973fb0a62973fb09d90d961ee43e5c8a"
+  integrity sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==
+
+tslint@5.20.1:
+  version "5.20.1"
+  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.20.1.tgz#e401e8aeda0152bc44dd07e614034f3f80c67b7d"
+  integrity sha512-EcMxhzCFt8k+/UP5r8waCf/lzmeSyVlqxqMEDQE7rWYiQky8KpIBz1JAoYXfROHrPZ1XXd43q8yQnULOLiBRQg==
+  dependencies:
+    "@babel/code-frame" "^7.0.0"
+    builtin-modules "^1.1.1"
+    chalk "^2.3.0"
+    commander "^2.12.1"
+    diff "^4.0.1"
+    glob "^7.1.1"
+    js-yaml "^3.13.1"
+    minimatch "^3.0.4"
+    mkdirp "^0.5.1"
+    resolve "^1.3.2"
+    semver "^5.3.0"
+    tslib "^1.8.0"
+    tsutils "^2.29.0"
+
+tsutils@^2.29.0:
+  version "2.29.0"
+  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-2.29.0.tgz#32b488501467acbedd4b85498673a0812aca0b99"
+  integrity sha512-g5JVHCIJwzfISaXpXE1qvNalca5Jwob6FjI4AoPlqMusJ6ftFE7IkkFoMhVLRgK+4Kx3gkzb8UZK5t5yTTvEmA==
+  dependencies:
+    tslib "^1.8.1"
+
 tunnel-agent@^0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz#27a5dea06b36b04a0a9966774b290868f0fc40fd"