diff --git a/.gitignore b/.gitignore
index 94d23ef..7adb4bf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,4 @@ build
 *.js
 *.map
 package-lock.json
-coverage/
\ No newline at end of file
+coverage
\ No newline at end of file
diff --git a/coverage/lcov-report/add-number.ts.html b/coverage/lcov-report/add-number.ts.html
index 19c895a..12f45af 100644
--- a/coverage/lcov-report/add-number.ts.html
+++ b/coverage/lcov-report/add-number.ts.html
@@ -97,7 +97,7 @@ <h1><a href="index.html">All files</a> add-number.ts</h1>
             <div class='footer quiet pad2 space-top1 center small'>
                 Code coverage generated by
                 <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
-                at Wed Apr 13 2022 13:51:46 GMT+0530 (India Standard Time)
+                at Wed Apr 13 2022 15:40:44 GMT+0530 (India Standard Time)
             </div>
         <script src="prettify.js"></script>
         <script>
diff --git a/coverage/lcov-report/index.html b/coverage/lcov-report/index.html
index 5d3a841..0cc7905 100644
--- a/coverage/lcov-report/index.html
+++ b/coverage/lcov-report/index.html
@@ -116,7 +116,7 @@ <h1>All files</h1>
             <div class='footer quiet pad2 space-top1 center small'>
                 Code coverage generated by
                 <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
-                at Wed Apr 13 2022 13:51:46 GMT+0530 (India Standard Time)
+                at Wed Apr 13 2022 15:40:44 GMT+0530 (India Standard Time)
             </div>
         <script src="prettify.js"></script>
         <script>
diff --git a/coverage/lcov-report/subtract-number.ts.html b/coverage/lcov-report/subtract-number.ts.html
index 52949c4..2ed734b 100644
--- a/coverage/lcov-report/subtract-number.ts.html
+++ b/coverage/lcov-report/subtract-number.ts.html
@@ -71,12 +71,10 @@ <h1><a href="index.html">All files</a> subtract-number.ts</h1>
 <a name='L6'></a><a href='#L6'>6</a>
 <a name='L7'></a><a href='#L7'>7</a>
 <a name='L8'></a><a href='#L8'>8</a>
-<a name='L9'></a><a href='#L9'>9</a>
-<a name='L10'></a><a href='#L10'>10</a></td><td class="line-coverage quiet"><span class="cline-any cline-no">&nbsp;</span>
+<a name='L9'></a><a href='#L9'>9</a></td><td class="line-coverage quiet"><span class="cline-any cline-no">&nbsp;</span>
 <span class="cline-any cline-no">&nbsp;</span>
 <span class="cline-any cline-no">&nbsp;</span>
 <span class="cline-any cline-neutral">&nbsp;</span>
-<span class="cline-any cline-neutral">&nbsp;</span>
 <span class="cline-any cline-no">&nbsp;</span>
 <span class="cline-any cline-neutral">&nbsp;</span>
 <span class="cline-any cline-neutral">&nbsp;</span>
@@ -85,7 +83,6 @@ <h1><a href="index.html">All files</a> subtract-number.ts</h1>
 <span class="cstat-no" title="statement not covered" >  <span class="missing-if-branch" title="if path not taken" >I</span>if (num1 &lt; 10 &amp;&amp; num2 &lt; 10) {</span>
 <span class="cstat-no" title="statement not covered" >    return num1 - num2</span>
   }
-&nbsp;
 <span class="cstat-no" title="statement not covered" >  return num1 - num2 + 10</span>
 }
 &nbsp;
@@ -97,7 +94,7 @@ <h1><a href="index.html">All files</a> subtract-number.ts</h1>
             <div class='footer quiet pad2 space-top1 center small'>
                 Code coverage generated by
                 <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
-                at Wed Apr 13 2022 13:51:46 GMT+0530 (India Standard Time)
+                at Wed Apr 13 2022 15:40:44 GMT+0530 (India Standard Time)
             </div>
         <script src="prettify.js"></script>
         <script>
diff --git a/coverage/lcov.info b/coverage/lcov.info
index 76ec9c0..f456de1 100644
--- a/coverage/lcov.info
+++ b/coverage/lcov.info
@@ -25,8 +25,8 @@ FNDA:0,(anonymous_0)
 DA:1,0
 DA:2,0
 DA:3,0
-DA:6,0
-DA:9,0
+DA:5,0
+DA:8,0
 LF:5
 LH:0
 BRDA:2,0,0,0
diff --git a/jest.config.json b/jest.config.json
index 9425161..0ed1a0d 100644
--- a/jest.config.json
+++ b/jest.config.json
@@ -4,5 +4,5 @@
   "moduleFileExtensions": ["ts", "js"],
   "coverageReporters": ["lcov", ["text", { "skipFull": true }]],
   "verbose": true,
-  "collectCoverageFrom": ["**/*.{ts, js}", "!**/node_modules/**", "!**/vendor/**"]
+  "collectCoverageFrom": ["./src/*/*.ts", "!**/node_modules/**"]
 }
diff --git a/package.json b/package.json
index 71d4c5f..d33fe31 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,6 @@
     "coverage": "npm run test"
   },
   "dependencies": {
-    "@istanbuljs/nyc-config-typescript": "^1.0.2",
     "@types/jest": "^27.4.1",
     "chai": "^4.3.6",
     "jest": "^27.5.1",
diff --git a/yarn.lock b/yarn.lock
index f1bf73a..8e9f29f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -296,13 +296,6 @@
     js-yaml "^3.13.1"
     resolve-from "^5.0.0"
 
-"@istanbuljs/nyc-config-typescript@^1.0.2":
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/@istanbuljs/nyc-config-typescript/-/nyc-config-typescript-1.0.2.tgz#1f5235b28540a07219ae0dd42014912a0b19cf89"
-  integrity sha512-iKGIyMoyJuFnJRSVTZ78POIRvNnwZaWIf8vG4ZS3rQq58MMDrqEX2nnzx0R28V2X8JvmKYiqY9FP2hlJsm8A0w==
-  dependencies:
-    "@istanbuljs/schema" "^0.1.2"
-
 "@istanbuljs/schema@^0.1.2":
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/@istanbuljs/schema/-/schema-0.1.3.tgz#e45e384e4b8ec16bce2fd903af78450f6bf7ec98"