diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f373598..bada3ed 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,43 +34,43 @@ jobs:
         - name: Node.js 0.8
           node-version: "0.8"
           npm-i: mocha@2.5.3 supertest@1.1.0
-          npm-rm: istanbul
+          npm-rm: nyc
 
         - name: Node.js 0.10
           node-version: "0.10"
-          npm-i: mocha@3.5.3 supertest@2.0.0
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
 
         - name: Node.js 0.12
           node-version: "0.12"
-          npm-i: mocha@3.5.3 supertest@2.0.0
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
 
         - name: io.js 1.x
           node-version: "1.8"
-          npm-i: mocha@3.5.3 supertest@2.0.0
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
 
         - name: io.js 2.x
           node-version: "2.5"
-          npm-i: mocha@3.5.3 supertest@2.0.0
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
 
         - name: io.js 3.x
           node-version: "3.3"
-          npm-i: mocha@3.5.3 supertest@2.0.0
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
 
         - name: Node.js 4.x
           node-version: "4.9"
-          npm-i: mocha@5.2.0 supertest@3.4.2
+          npm-i: mocha@5.2.0 nyc@11.9.0 supertest@3.4.2
 
         - name: Node.js 5.x
           node-version: "5.12"
-          npm-i: mocha@5.2.0 supertest@3.4.2
+          npm-i: mocha@5.2.0 nyc@11.9.0 supertest@3.4.2
 
         - name: Node.js 6.x
           node-version: "6.17"
-          npm-i: mocha@6.2.2
+          npm-i: mocha@6.2.2 nyc@14.1.1
 
         - name: Node.js 7.x
           node-version: "7.10"
-          npm-i: mocha@6.2.2
+          npm-i: mocha@6.2.2 nyc@14.1.1
 
         - name: Node.js 8.x
           node-version: "8.17"
@@ -154,7 +154,7 @@ jobs:
     - name: Run tests
       shell: bash
       run: |
-        if npm -ps ls istanbul | grep -q istanbul; then
+        if npm -ps ls nyc | grep -q nyc; then
           npm run test-ci
         else
           npm test
@@ -166,7 +166,7 @@ jobs:
 
     - name: Collect code coverage
       uses: coverallsapp/github-action@master
-      if: steps.list_env.outputs.istanbul != ''
+      if: steps.list_env.outputs.nyc != ''
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
         flag-name: run-${{ matrix.test_number }}
diff --git a/.gitignore b/.gitignore
index 4811400..c3c7ad9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.nyc_output
 coverage
 node_modules
 package-lock.json
diff --git a/package.json b/package.json
index c9c4ed9..3cde223 100644
--- a/package.json
+++ b/package.json
@@ -24,8 +24,8 @@
     "eslint-plugin-node": "11.1.0",
     "eslint-plugin-promise": "4.3.1",
     "eslint-plugin-standard": "4.0.1",
-    "istanbul": "0.4.5",
     "mocha": "8.4.0",
+    "nyc": "15.1.0",
     "supertest": "6.1.6"
   },
   "files": [
@@ -39,7 +39,7 @@
   "scripts": {
     "lint": "eslint .",
     "test": "mocha --reporter spec --bail --check-leaks test/",
-    "test-ci": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --reporter spec --check-leaks test/",
-    "test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --reporter dot --check-leaks test/"
+    "test-ci": "nyc --reporter=lcov --reporter=text npm test",
+    "test-cov": "nyc --reporter=html --reporter=text npm test"
   }
 }