diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 32c1d9e..f929efb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -56,7 +56,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       mongodb:
-        image: mongo:3.6
+        image: mongo:4.2
         ports:
         - 27017:27017
     strategy:
@@ -82,7 +82,7 @@ jobs:
     needs: unit-test
     services:
       mongodb:
-        image: mongo:3.6
+        image: mongo:4.2
         ports:
         - 27017:27017
     steps:
diff --git a/docker/README.md b/docker/README.md
index 54ac504..fda97b1 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -56,7 +56,7 @@ services:
             - "IOTA_PROVIDER_URL=http://iot-agent:4041"
 
     mongodb:
-        image: mongo:3.6
+        image: mongo:4.2
         hostname: mongodb
         container_name: db-mongo
         ports: